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Intrinsic factor secreted by parietal cells is essential for:
A.Activation of pepsinogen to pepsin
B.Absorption of vitamin B12 in the intestine✓
C.Emulsification of dietary fats
D.Neutralization of stomach acid in the duodenum
Explanation
Intrinsic factor binds vitamin B12 in the intestine and is required for its absorption in the ileum. The other options describe functions of other substances: pepsinogen activation requires pepsin/acid, emulsification is by bile salts, and neutralization in the duodenum is by pancreatic bicarbonate.
2Biologydelta cells somatostatin
The δ (delta) cells in the islets of Langerhans secrete:
A.Insulin
B.Somatostatin✓
C.Glucagon
D.Pancreatic polypeptide
Explanation
Delta cells secrete somatostatin, which inhibits secretion of both insulin and glucagon. Insulin is secreted by β-cells, glucagon by α-cells, and pancreatic polypeptide by PP cells.
3Biologyduodenum function
Identify the main function of duodenum:
A.Bile storage
B.Absorption of water
C.Digestion of food✓
D.Waste storage
Explanation
The duodenum is the principal site for the chemical digestion of chyme using pancreatic enzymes and bile. Bile is stored in the gallbladder (not duodenum), water absorption mainly occurs in the large intestine, and waste storage refers to the rectum.
4Biologyswallowing stage pharyngeal protection
Which stage of the swallowing process prevents food or liquid from being aspirated to the lungs?
A.Oral
B.Pharyngeal✓
C.Oesophageal
D.Peristalsis
Explanation
The pharyngeal stage closes the airway (via laryngeal elevation and epiglottis action) to prevent aspiration. The oral stage prepares the bolus, oesophageal stage moves it to the stomach, and peristalsis is the motility mechanism rather than the airway-protecting stage.
5Biologynephron types juxtamedullary
Which type of nephron is responsible for the development of osmotic gradients in the renal medulla?
A.Glomerular
B.Cortical
C.Juxtamedullary✓
D.Medullary
Explanation
Juxtamedullary nephrons have long loops of Henle that extend deep into the medulla and are essential for creating the medullary osmotic gradient used in urine concentration. Cortical nephrons have shorter loops and do not establish the gradient.
6Biologydistal convoluted tubule acid base
Which of the following describes how the distal convoluted tubule contributes to regulation of blood pH in the body?
A.Selective reabsorption of Glucose
B.Active secretion of hydrogen ions into the filtrate✓
C.Active secretion of sodium from the glomerular filtrate
D.Tubular reabsorption of potassium ions
Explanation
The distal convoluted tubule secretes hydrogen ions (and reabsorbs bicarbonate) to help regulate blood pH. Glucose reabsorption occurs primarily in the proximal tubule; the other options concern sodium/potassium handling but do not directly describe acid secretion for pH regulation.
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The sodium potassium pumps in the distal convoluted tubule are activated by:
A.Aldosterone
B.Antidiuretic hormone
C.Anti-natriuretic peptide
D.Renin
Answer and explanation locked
8Biologywater intake adh response
If a person drinks excessive amount of water, how does the kidney respond to maintaining osmoregulation?
A.Increase ADH release and water reabsorption
B.Increase aldosterone release and reabsorb more sodium
C.Decrease renin secretion and retain more water
D.Decrease ADH release and increase water excretion
Answer and explanation locked
9Biologyglomerular capillary filtration
The primary function of glomerular capillaries is:
A.Reabsorption of water and solutes from the renal tubules
B.Secretion of waste products from the blood into the tubules
C.Filtration of blood from glomerular filtrate
D.Supply of nutrients and oxygen to the kidney
Answer and explanation locked
10Biologyheat stroke hypothalamic response
In a heat stroke the hypothalamus will detect an increase in core body temperature, which of the following response is triggered
A.Vasoconstriction and shivering
B.Vasodilation and sweating
C.Increased metabolic rate
D.Release of thyroxin
Answer and explanation locked
11Biologynitrogenous waste solubility
Which nitrogenous waste has the lowest solubility in water?
A.Urea
B.Ammonia
C.Uric acid
D.Nitrite
Answer and explanation locked
12Biologyexcretory system classification
By nature, human excretory system is:
A.Ammonotelic
B.Uricotelic
C.Ureotelic
D.Aminotelic
Answer and explanation locked
13Biologyhyperparathyroidism kidney stones
Hyperparathyroidism may lead to the formation of:
A.Calcium phosphate stones
B.Uric acid stones
C.Cystine stones
D.Struvite stones
Answer and explanation locked
14Biologysomatic cell hybridization monoclonal production
In somatic cell hybridization, which two cells are fused to produce monoclonal antibodies?
A.T-cells and nerve cells
B.B-lymphocytes and spleen cells
C.T-cells and liver cells
D.B-lymphocytes and macrophages
Answer and explanation locked
15Biologydna rna probes molecular diagnostics
In molecular diagnostics, the primary function of DNA/RNA probes is to:
A.Replace malfunctioning genes in effected cells
B.Bind to specific DNA or RNA sequences for identification
C.Cut genetic material at precise locations
D.Stimulate immune responses against disease-causing organisms
Answer and explanation locked
16Biologymonoclonal antibodies definition
A set of uniform proteins generated by genetically identical immune cells (a clone) is called:
A.Therapeutic proteins
B.Immunoglobulins
C.Monoclonal antibodies
D.Recombinant proteins
Answer and explanation locked
17Biologygene therapy vector
Which biotechnological product is used to replace an abnormal gene in a patient's cells?
A.Antibiotic
B.Vaccine
C.Vector
D.Interferon
Answer and explanation locked
18Biologybase pairing cytosine guanine
In Watson and Crick's DNA model, which of the following pairs with Cytosine?
A.Adenine
B.Guanine
C.Thymine
D.Uracil
Answer and explanation locked
19Biologyfats as energy source
Fats are considered as a very efficient source of energy because they:
A.Produce ATP directly and without requiring respiration
B.Enter into glycolysis without any modification
C.Are highly oxidized compounds
D.Generate multiple acetyl groups that produce more ATP
Answer and explanation locked
20Biologysynapse definition
The junction between two consecutive neurons where information is transmitted from one neuron to the next is called:
A.Node-of Ranvier
B.Synapse
C.Axon terminal
D.Dendrite cleft
Answer and explanation locked
21Biologygolgi body functions
All of the following are the functions of Golgi bodies EXCEPT:
A.Processing of protein
B.Plasma membrane formation
C.Cellular respiration
D.Lysosome formation
Answer and explanation locked
22Biologyresting membrane ion distribution
Which ion is tenfold higher in concentration outside the membrane of neuron during resting potential?
A.Potassium
B.Sodium
C.Calcium
D.Hydrogen
Answer and explanation locked
23Biologymodes of hiv transmission
All of the following are the modes of transmission of AIDS, EXCEPT:
A.Transfusion of infected blood
B.Sharing infected needles
C.Shaking hands with infected person
D.Sexual contact with infected person
Answer and explanation locked
24Biologydetoxification organelles
Which organelle of the cell is involved in the detoxification of toxins and poisonous compounds?
A.Lysosomes
B.Smooth Endoplasmic Reticulum
C.Ribosomes
D.Mitochondria
Answer and explanation locked
25Biologyactive site role
The active site is important in enzyme action because:
A.It binds to the substrate
B.It maintains the pH of reaction
C.It provides energy for reaction
D.It changes the shape of the enzyme
Answer and explanation locked
26Biologylamarckism vs darwinism
The idea that acquired characters are inherited is part of:
A.Darwinism
B.Neo Darwinism
C.Lamarckism
D.Biogenesis
Answer and explanation locked
27Biologyenveloped virus diseases
Which disease is caused by enveloped virus?
A.Leaf curl disease of cotton
B.Flu
C.Polio
D.Hepatitis A
Answer and explanation locked
28Biologyglycoprotein location
The glycoproteins are commonly found in:
A.Mitochondria
B.Chloroplasts
C.Ribosomes
D.Plasma membrane
Answer and explanation locked
29Biologynucleus cytoplasm exchange
Which structure enables the exchange of material between nucleus and cytoplasm?
A.Plasma membrane
B.Nuclear pores
C.Lysosomes
D.Mitochondria
Answer and explanation locked
30Biologywater specific heat
The high specific heat capacity of water is due to:
A.Ionic bonding
B.Hydrogen bonding
C.Covalent bonding
D.Hydrophilic bonding
Answer and explanation locked
31Biologychromosome structure centromere
The contracted region of a chromosome that attaches to spindle fiber is called:
A.Telomere
B.Chromatin
C.Centromere
D.Nucleosomes
Answer and explanation locked
32Biologysensory vs motor neurons
Touching a sharp object stimulates pain receptors. This information is carried to the central nervous system by the:
A.Motor-neuron
B.Sensory neuron
C.Associative neuron
D.Effector neuron
Answer and explanation locked
33Biologyhaploid chromosome number
The number of chromosomes in a haploid cell are:
A.Half the chromosomes in a normal body cell
B.Double the chromosomes in a normal body cell
C.Quarter the chromosomes in a normal body cell
D.Equal to the chromosomes in a normal body cell
Answer and explanation locked
34Biologyanimal polysaccharides
Which of the following is a branched polysaccharide found in animals:
A.Cellulose
B.Glycogen
C.Amylose
D.Chitin
Answer and explanation locked
35Biologyenzyme inhibitors
A substance that binds to an enzyme, but NOT at the active site and reduces the enzyme activity is called:
A.Competitive inhibitor
B.Substrate
C.Non-Competitive inhibitor
D.Cofactor
Answer and explanation locked
36Biologyviral morphology influenza
On the basis of morphological classification, influenza virus is an example of:
A.Helical capsid virus
B.Polyhedral capsid virus
C.Enveloped capsid virus
D.Non-enveloped capsid virus
Answer and explanation locked
37Biologyglobular vs fibrous proteins
Which of the following is NOT a globular protein?
A.Enzyme
B.Albumin
C.Hemoglobin
D.Collagen
Answer and explanation locked
38Biologyneuronal resting state
The state, when a neuron is NOT conducting an impulse during resting membrane potential is called;
A.Polarized
B.Depolarized
C.Repolarized
D.Hyperpolarized
Answer and explanation locked
39Biologynerve impulse conduction
Which of the following waves travel along a neuron during nerve impulse conduction?
A.Thermal waves
B.Mechanical waves
C.Electromagnetic waves
D.Electrochemical waves
Answer and explanation locked
40Biologyreticular formation
The reticular formation in the brain runs through which structures?
A.Forebrain and Midbrain
B.Hindbrain and Midbrain
C.Cerebellum and Forebrain
D.Telencephalon and Cerebellum
Answer and explanation locked
41Biologyenzyme catalysis
Enzymes increase the rate of reaction by:
A.Increasing activation energy
B.Lowering activation energy
C.Increasing pH
D.Decreasing pH
Answer and explanation locked
42Biologycarbohydrate digestion and glycaemia
A diabetic patient is advised to avoid both sucrose and lactose, because they both:
A.Are structural carbohydrates
B.Increase blood glucose after hydrolysis
C.Cannot be digested in human
D.Act as non-caloric sweeteners
Answer and explanation locked
43Biologybrain regions and functions
Match the CORRECT structure of the brain with its function:
A.Medulla: Breathing
B.Pons: Memory
C.Cerebellum: Dreaming
D.Midbrain: Balance
Answer and explanation locked
44Biologycellular energy acquisition
Living cells Do NOT directly acquire energy released from the breakdown of food molecules because:
A.Glucose cannot be broken down inside the cells
B.Energy released is too small to be used by the cells
C.Glucose molecules do not store any energy
D.The energy released is too large, leading to heating and wastage
Answer and explanation locked
45Biologyproperties of water
Which properties of water enable it to circulate in living bodies and act as transport medium?
A.Ionization and low density
B.Cohesion and ionization
C.Ionization and adhesion
D.Adhesion and cohesion
Answer and explanation locked
46Biologylamarckism vs darwinism
A scientist cuts the tails of mice for several generations, but their offspring are always born with tails. This rejects:
A.Darwinism
B.Neo Darwinism
C.Lamarckism
D.Mutation theory
Answer and explanation locked
47Biologymembrane phospholipid arrangement
How are the phospholipid molecules arranged in the plasma membrane?
A.Hydrophilic heads face inwards and hydrophobic tails face outwards
B.Both Hydrophilic heads face each other in the membrane
C.Hydrophilic heads face outwards and hydrophobic tails face inwards
D.Hydrophilic heads and hydrophobic tails are randomly distributed
Answer and explanation locked
48Biologyrna structure
48. The structure of RNA consists of:
A.Double polynucleotide strand
B.Deoxyribose sugar
C.Five different types of nucleotides
D.Base pairing instead of thymine
Answer and explanation locked
49Biologymonosaccharide classification
50. Identify the CORRECT option that matches the sugar with its carbon number and functional group:
A.Glyceraldehyde - Triose, Ketone group
B.Ribose - Pentose, Aldehyde group
C.Ribulose - Pentose, Aldehyde Group
D.Galactose - Hexose, Ketone Group
Answer and explanation locked
50Biologyreflex arc sequence
51. The CORRECT sequence of events in a reflex arc is:
A.Receptor, associative neuron, sensory neuron, motor neuron, effector
B.Receptor, motor neuron, associative neurone, sensory neuron, effector
C.Receptor, sensory neuron, associative neuron, motor neuron, effector
D.Receptor, sensory neuron, motor neuron, associative neuron, effector
Answer and explanation locked
51Biologyfertilization site
52. Fertilisation normally occurs in the:
A.Uterus
B.Ovary
C.Vagina
D.Fallopian tubes
Answer and explanation locked
52Biologyfallopian tube epithelium
53. Which cells of the fallopian tube moisten and nourish the ovum?
A.Ciliated epithelial cells
B.Non ciliated epithelial cells
C.Germ cells
D.Endometrial cells
Answer and explanation locked
53Biologymale accessory glands
54. Which of the following is NOT the accessory gland of the male reproductive system?
A.Bulbourethral gland
B.Seminal vesicle
C.Testes
D.Prostate gland
Answer and explanation locked
54Biologysyphilis bacteria type
55. Syphilis is caused by what kind of bacteria:
A.Spirochaete
B.Cocci
C.Bacillus
D.Vibrio
Answer and explanation locked
55Biologycartilage characteristics
56. What is FALSE about cartilages?
A.Cells are called chondrocytes
B.Consist of Type II collagen
C.Heal very slowly
D.Have an extensive blood supply
Answer and explanation locked
56Biologybone composition
57. Bones provide a rigid framework with an inorganic matrix of:
A.35%
B.45%
C.55%
D.65%
Answer and explanation locked
57Biologybone remodeling cells
58. An important feature of bone remodeling is bone breakdown. Which cell carries out this function?
A.Chondrocyte
B.Osteocyte
C.Osteoclast
D.Osteoblast
Answer and explanation locked
58Biologymyofibril contractile unit
Myofibrils consist of small contractile units called___
A.Sarcoplasm
B.Sarcolemma
C.Sarcomere
D.Sarcoplasmic reticulum
Answer and explanation locked
59Biologymuscle types
Which muscle type is under conscious control and is multinucleated?
A.Smooth muscle
B.Skeletal muscle
C.Cardiac muscle
D.Ciliary muscle
Answer and explanation locked
60Biologysarcomere structure
Which part of the sarcomere contain both actin and myosin filament?
A.I-band
B.Z-line
C.A-band
D.H-zone
Answer and explanation locked
61Biologyexcitation contraction coupling
The primary role of calcium ions in muscle contraction is to:
A.Produce energy
B.Bind with troponin
C.Carry nerve impulses
D.Breakdown ATP
Answer and explanation locked
62Biologyjoints fibrous
Which of the following is an example of a fibrous joint?
A.Shoulder joint
B.Elbow joint
C.Intervertebral discs
D.Skull sutures
Answer and explanation locked
63Biologymendelian law dominance
Which of Mendel's laws can best explain why a child may inherit brown eyes even if one parent has blue eyes?
A.Law of Dominance
B.Law of Segregation
C.Law of Independent Assortment
D.Law of Recombination
Answer and explanation locked
64Biologydihybrid ratio
What is the significance of the 9:3:3:1ratio in a dihybrid cross?
A.It proves that all genes are linked
B.It demonstrates that traits assort independently
C.It indicates co-dominance between alleles
D.It confirms that mutations have occurred
Answer and explanation locked
65Biologymeiosis crossing over
In crossing over, an exchange of maternal and paternal chromatid parts occurs while homologous chromosomes are paired _____ stage of meiosis.
A.Metaphase I
B.Prophase I
C.Anaphase II
D.Telophase I
Answer and explanation locked
66Biologylinked genes
Linked genes DO NOT follow Mendel's Law of Independent Assortment because
A.They are located on different chromosomes
B.They always undergo crossing over
C.They are physically close together on the same chromosome
D.They rarely separate during meiosis
Answer and explanation locked
67Biologyx linked carrier
A carrier female for an X-linked recessive disorder:
A.Expresses the disorder fully
B.Cannot pass the disorder to her sons
C.Can pass the disorder to her sons
D.Only pases the disorder to her sons
Answer and explanation locked
68Biologyx linked disorders
Which of the following is an X-linked recessive disorder in humans?
A.Cystic fibrosis
B.Thalassemia
C.Hemophilia
D.Sickle cell anemia
Answer and explanation locked
69Biologyhemophilia inheritance
Which of the following CORRECTLY describes the expected outcome of children from a carrier mother for hemophilia (X^h X^h) and a normal father (X^Y)?
A.All sons will have hemophilia
B.All daughters will be carriers
C.50% of sons will have hemophilia, and 50% of daughters will be carriers
D.All offspring will be unaffected
Answer and explanation locked
70Biologyheart membranes
The heart is surrounded by a tough, inelastic double membranous covering called:
A.Pleura
B.Peritoneum
C.Pericardium
D.Meninges
Answer and explanation locked
71Biologycardiac cycle
Which phase of the cardiac cycle is characterized by the opening of semilunar valves?
A.Atrial systole
B.Atrial diastole
C.Ventricular systole
D.Ventricular diastole
Answer and explanation locked
72Biologycardiac conduction
Which part of the heart's conducting system delays the impulse from atria to the ventricles?
A.Sino-atrial node
B.Atrio-ventricular node
C.Purkinje fibers
D.Atrio-ventricular valves
Answer and explanation locked
73Biologyheart sounds
The heartbeat sound “LUB” is produced on closure of
A.Aortic valve
B.Atro-ventricular valves
C.Pulmonary valves
D.Semilunar valves
Answer and explanation locked
74Biologylymphatic function
What is the primary function of lymphatic vessels?
A.Transport oxygenated blood
B.Drain excess interstitial fluid
C.Produce antibodies
D.Store metabolic waste
Answer and explanation locked
75Biologyhelper t cells
The primary role of helper T cells in immune response is:
A.Secreting perforins to destroy target cells
B.Assisting B-cells and other T-cells in their function
C.Inhibiting over activity of the immune system
D.Engulfing and digesting pathogens
Answer and explanation locked
76Biologyinnate immune component
Identify the primary component of innate immune defense.
A.Complement system and interferons
B.Physical component of skin defense
C.Specific recognition and memory of pathogens
D.General inflammation and the site of infection
Answer and explanation locked
77Biologyinspiratory reserve volume
Which of the following best describes Inspiratory Reserve Volume (IRV)?
A.The volume of air forcibly exhaled after normal tidal volume
B.The volume of air remaining in the lungs after tidal
C.The volume of air exchanged during normal breathing
D.The volume of air forcibly inhaled after normal tidal volume
Answer and explanation locked
78Biologycarbonic anhydrase role
During gaseous exchange in human respiration, enzyme carbonic anhydrase is directly involved in the:
A.Release of oxygen from hemoglobin
B.Combination of water with carbon dioxide
C.Breakdown of oxyhemoglobin
D.Binding of oxygen to myoglobin
Answer and explanation locked
79Biologyintercostal muscles and inhalation
What happens when the external intercostal muscles contract during inhalation in humans?
A.The rib cage compresses
B.The ribs move outward
C.The sternum moves inwards
D.The diaphragm muscles relax
Answer and explanation locked
80Biologyeffects of smoking on respiratory system
The primary effect of smoking on the respiratory system:
A.Increased lung function due to presence of nicotine
B.Reduced risk of lung cancer due to tolerance
C.Damage to alveoli reducing gaseous exchange
D.Improves oxygenation of the blood by activating hemoglobin
Answer and explanation locked
81Physicslenz law
According to Lenz's Law, the direction of induced current in a conductor is such that it:
A.Opposes the change in magnetic flux
B.Enhances the change in magnetic flux
C.Is perpendicular to the magnetic field
D.Is parallel to the magnetic field
Answer and explanation locked
82Physicscapacitance ac circuit
In a pure capacitance AC circuit, the current:
A.Lags behind voltage by 90°
B.Leads the voltage by 90°
C.Is in phase with the voltage
D.Leads the voltage by 45°
Answer and explanation locked
83Physicsfull wave rectifier
In a full-wave rectifier using two diodes, the diodes:
A.D1 and D2 operate:
B.Simultaneously during both half-cycles
C.In alternate switching mode
D.Only when both ends of transformer are positive
Answer and explanation locked
84Physicsenergy of a quantum
The energy of a quantum is given by which equation?
A.E = mc^2
B.E = hf
C.E = 1/2 mv^2
D.E = qV
Answer and explanation locked
85Physicsbrackett series
In hydrogen spectrum, the Brackett series lies in
A.Ultraviolet region
B.Visible region
C.Infrared region
D.X ray region
Answer and explanation locked
86Physicsuniform acceleration
A car starts from rest and moves with a uniform acceleration of 3m/s^2. What will be its velocity after 5 seconds?
A.8m/s
B.12m/s
C.15m/s
D.18m/s
Answer and explanation locked
87Physicsinertia
A passenger standing in a stationary bus. When the bus suddenly starts moving forward, the passenger falls backward. Which phenomenon best explains this observation?
A.Friction
B.Gravity
C.Inertia
D.Deceleration
Answer and explanation locked
88Physicsmomentum conservation
A 0.02kg bullet moving at 300m/s embeds itself in a 2 kg block at rest on a smooth surface. What is the velocity of the block-bullet system just after impact?
A.2m/s
B.3m/s
C.4m/s
D.5m/s
Answer and explanation locked
89Physicsprojectile motion
Which of the following statement about projectile motion is CORRECT?
A.The horizontal velocity of a projectile changes constantly due to gravity
B.The vertical velocity of a projectile remains constant throughout the flight
C.At the highest point, the vertical velocity of the projectile is zero, but the horizontal velocity remains unchanged
D.The acceleration of the projectile is zero at the peak of its trajectory
Answer and explanation locked
90Physicsinstantaneous power
The rate of doing work at any instant of time is called:
A.Work done
B.Instantaneous power
C.Average power
D.Mechanical energy
Answer and explanation locked
91Physicspotential energy conversion
A 5kg body falls from the height of 30m towards the ground. All its potential energy is converted into heat on impact. What is the heat energy produced?
A.1270J
B.1370J
C.1470J
D.1570J
Answer and explanation locked
92Physicswork and power
Two students, A and B, each carry a 20kg load to the top of a long staircase. Student A takes 10sec, while student B takes 20sec. Which statement is CORRECT?
A.Student A does more work than student B
B.Student B uses more power than student A
C.Both students do the same amount of work, but student A uses more power
D.Student A and B use the same power since they lifted the same weight
Answer and explanation locked
93Physicsangular acceleration linear
A wheel of radius 0.4m has an angular acceleration of 1.2 rad/s^2. The linear acceleration is:
A.1.2 m/s^2
B.1.2 m/s
C.2.4 m/s^2
D.4 m/s^2
Answer and explanation locked
94Physicsangular velocity direction
If an object is moving anticlockwise along a circular path, in a horizontal plane on a page then the direction of its angular velocity is:
A.Tangential to any point on the circle
B.Towards centre of the circle
C.Perpendicular to the plane and pointing out of the page
D.Perpendicular to the plane and pointing into the page
Answer and explanation locked
95Physicsarc length formula
If a particle moves along a circular path of radius r with angular displacement θ (in radians), then the arc length s is given by:
A.rθ
B.r/θ
C.θ/r
D.2πrθ
Answer and explanation locked
96Physicsdrag net force
A ball of weight Fg is falling vertically downward through air. If the drag force acting on it at some instant is Fd, what is the Fnet (net force) on the ball?
A.Fg + Fd
B.Fg - Fd
C.Fd - Fg
D.Fd/Fg
Answer and explanation locked
97Physicsturbulent flow
Most kinds of fluid flow are turbulent rather than laminar because of:
A.Zero viscosity
B.Very low velocities
C.High velocities
D.No resistance
Answer and explanation locked
98Physicscontinuity equation
According to law of continuity, when the cross-sectional area of a pipe decreases, the fluid velocity:
A.Increases
B.Decreases
C.Remains the same
D.Becomes zero
Answer and explanation locked
99Physicsbernoulli pressure
Water flows steadily through a pipe that gradually narrows. At the wider end, the velocity of water is 1m/s, at the narrower end, the velocity is 3m/s. Which statement is CORRECT about the pressure in the narrower end compared to the wider end?
A.Pressure is lower at the narrow end because velocity is higher
B.Pressure is higher at the narrow end because velocity is higher
C.Pressure is the same at both ends since flow is continuous
D.Pressure is independent of velocity of water
Answer and explanation locked
100Physicswave motion condition
What is the necessary condition of a wave motion?
A.The medium must be elastic
B.The medium must be inelastic
C.The particles of the medium must be independent of each other
D.The particles of the medium must not be dependent on each other
Answer and explanation locked
101Physicsprogressive wave
A progressive wave is one which:
A.Does not vibrate the medium
B.Carries energy across the medium
C.Propagates only through air
D.Requires a denser medium for propagation
Answer and explanation locked
102Physicsspeed of sound dependence
Speed of sound in air increases with:
A.Higher temperature, higher humidity
B.Lower temperature, lower humidity
C.Higher pressure at constant temperature
D.Higher density at constant elasticity
Answer and explanation locked
103Physicswavelength change
A wave has velocity 300m/s and frequency 100Hz. If the medium is changed so that velocity doubles but frequency remains constant, the new wavelength will be:
A.Halved
B.Doubled
C.Same
D.Zero
Answer and explanation locked
104Physicsshm kinetic energy
When a particle executing simple harmonic motion moves from the mean position to the extreme position, its kinetic energy:
A.Increases continuously
B.Decreases continuously and becomes zero at the extreme position
C.Remains constant throughout the motion
D.Becomes maximum at the extreme position
Answer and explanation locked
105Physicsheat flow direction
Heat will spontaneously flow from:
A.Lower to higher internal energy only
B.High pressure to low pressure
C.High to low temperature
D.Low temperature to high temperature
Answer and explanation locked
106Chemistrycp minus cv
At a constant Pressure (Cp) and Volume (Cv), an ideal gas has C p - C v = R Then Cp will be?
A.R/2
B.3/2 R
C.5/2 R
D.7/2 R
Answer and explanation locked
107Physicsdefinition of electric field
The electric field at a point is defined as:
A.Potential per unit charge
B.Work done per unit time
C.Charge per unit area
D.Force per unit positive test charge
Answer and explanation locked
108Physicscoulombs law relation
Coulomb's law fits well into:
A.Newton's 1st law
B.Newton's 2nd law
C.Newton's 3rd law
D.Gauss's law
Answer and explanation locked
109Physicselectric potential difference
The work done in moving a unit positive charge from one point to another while keeping the charge in electrostatic equilibrium is called:
A.Kinetic energy
B.Potential energy
C.Elastic potential energy
D.Potential difference
Answer and explanation locked
110Physicspower dependence on voltage
If the potential difference (V) across a conductor is doubled, keeping resistance (R) constant, the power dissipated (P) becomes:
A.Doubled
B.Halved
C.Four times
D.Remains unchanged
Answer and explanation locked
111Chemistryfree radical chlorination
Consider the chlorination of methane to methyl chloride, the attack of chlorine free radical on methane, occurs in which phase?
A.Before initiation
B.Initiation
C.Propagation
D.Termination
Answer and explanation locked
112Biologypancreatic carboxypeptidase
A patient with pancreatic insufficiency shows reduced activity of an enzyme that hydrolyzes the first peptide bond at the carboxyl end of proteins and peptides. Which enzyme is deficient?
A.Elastase
B.Pepsin
C.Carboxypeptidase
D.Collagenase
Answer and explanation locked
113Chemistryelectrolytic cell anode
In an electrolytic cell when the current passes through a solution, the anode is:
A.a positive electrode where oxidation occurs
B.a negative electrode where oxidation occurs
C.a negative electrode where reduction occurs
D.a positive electrode where reduction occurs
Answer and explanation locked
114Chemistryinternal energy effects
An increase in the internal energy of a chemical system can lead to all EXCEPT:
A.An increase in temperature due to rise in kinetic energy of molecules
B.A phase change such as melting or evaporation
C.A chemical reaction if energy supplied is sufficient to break bonds
D.An increase in temperature due to drop in kinetic energy of molecules
Answer and explanation locked
115Chemistrysp2 hybridization in ethene
In ethene molecule, each carbon atom has three hybridized sp2 orbitals which are:
A.Coplanar
B.Tetrahedral
C.Linear
D.Pyramidal
Answer and explanation locked
116Chemistryberyllium oxidation beo layer
Which of the following best explains the reaction between Beryllium (Be) and Oxygen (O)?
A.Be burns vigorously with oxygen forming a layer of BeO, which accelerates the oxidation of remaining metal
B.Be reacts with oxygen forming a layer of BeO, which protects the metal from further oxidation
C.Be reacts slowly with oxygen to form a volatile oxide BeO, which evaporates quickly
D.Be is the only alkaline earth metal that doesn't react with oxygen
Answer and explanation locked
117Chemistrygas constant value
The value of R in atm.dm3.mol-1.K-1 is:
A.0.0821
B.0.821
C.62.4
D.8.314
Answer and explanation locked
118Chemistryfactors affecting rate
The rate of a chemical reaction changes with:
A.Concentration of reactant molecules
B.Concentration of product molecules
C.Concentration of both reactant and product
D.Rate constant
Answer and explanation locked
119Chemistryplanck hf dependence
According to Planck's quantum theory, if the frequency of photon is doubled, the value of hf will be:
A.Doubled
B.Increased 3 times
C.Increased 4 times
D.Unchanged
Answer and explanation locked
120Chemistryrate constant dependence
The specific rate constant (k) of a reaction is related to the concentration of reactants:
A.Directly
B.Inversely
C.Exponentially
D.Independently
Answer and explanation locked
121Biologyprotein secondary structure
An experiment shows that heating a 'protein' disrupts the alpha helix structure. Which protein structure is mainly affected?
A.Primary structure
B.Secondary structure
C.Tertiary structure
D.Quaternary structure
Answer and explanation locked
122Chemistrykinetic molecular theory
Which of the following is NOT a postulate of kinetic molecular theory of gases?
A.Gas molecules undergo elastic collision
B.Gas molecules are in continuous random motion
C.Gas molecules do not exert pressure when molecules collide with wall of container
D.Gas molecules are far away from each other
Answer and explanation locked
123Chemistryspectral series hydrogen
Spectral series for hydrogen spectrum are :
A.2
B.3
C.4
D.5
Answer and explanation locked
124Chemistrymost electronegative element
The most electronegative element in periodic table is:
A.F
B.Cl
C.N
D.O
Answer and explanation locked
125Chemistryeffect of temperature on ΔH positive reaction
If ΔH for a reaction is positive, then by decreasing temperature, the reaction will
A.Move forward
B.Move in reverse
C.Have no effect
D.Be both forward and reverse
Answer and explanation locked
126Chemistryhydration of propene
The addition of water to propene in the presence of sulfuric acid produces:
A.Propane
B.Propan-2-ol
C.Butanol
D.Ethanol
Answer and explanation locked
127Chemistrysp2 hybridization examples
In which of the following molecules does the central atom use sp2 hybridization?
A.PH3
B.NH3
C.BH3
D.SbH3
Answer and explanation locked
128Chemistryphenol carbon hybridization
In a molecule of phenol, the carbon atom which is attached to -OH group is:
A.sp hybridized
B.sp2 hybridized
C.sp3 hybridized
D.unhybridized
Answer and explanation locked
129Chemistryplanar molecule example
Which one of the following is a planar molecule?
A.NH3
B.H2O
C.BF3
D.CH4
Answer and explanation locked
130Chemistrybond energy comparison
Which of the following has highest bond energy?
A.HCl
B.HI
C.HF
D.HBr
Answer and explanation locked
131Englishgerund phrase function
In the sentence "Jogging every morning improves my mood," what role does the gerund phrase play?
A.Object of a verb
B.Direct object
C.Predicative noun
D.Subject
Answer and explanation locked
132Englishprepositions time expressions
The meeting has been scheduled ___ 3 p.m. sharp.
A.on
B.at
C.in
D.to
Answer and explanation locked
133Englishtransitional device
"She studied hard; ______, she passed the exam with distinction." Choose the CORRECT transitional device:
A.however
B.for instance
C.consequently
D.in contrast
Answer and explanation locked
134Englishpassive voice usage
She completed the task with great difficulty. Identify the CORRECT usage of passive voice.
A.The task was completed with great difficulty by her.
B.The task has been completed with great difficulty by her.
C.The task was been completed with great difficulty by her.
D.The task was being completed with great difficulty by her.
Answer and explanation locked
135Englishsubject verb agreement
Each of the boys ______ ambitious to lead the team.
A.have
B.has
C.is
D.are
Answer and explanation locked
136Englishfigurative language
"Revenge is a kind of wild justice." The sentence illustrates the use of:
A.Personification
B.Pun
C.Metaphor
D.Hyperbole
Answer and explanation locked
137Englishvocabulary meaning
The old man was feeble, barely able to walk. The word 'feeble' means:
A.Healthy
B.Weak
C.Strong
D.Fat
Answer and explanation locked
138Englishliterary devices
Which literary device involves using words or phrases that convey the opposite of their literal meaning?
A.Irony
B.Parody
C.Satire
D.Sarcasm
Answer and explanation locked
139Englishpossessive pronoun
All of the players forgot ____ jerseys.
A.his
B.her
C.them
D.their
Answer and explanation locked
140Logical Reasoninghalving dosing
A medication dose starts at 100mg and halves each day. What will be the dose on day 4?
A.12.5mg
B.25mg
C.30mg
D.50mg
Answer and explanation locked
141Logical Reasoningequalizing books shelf
A library has 4 books on Shelf A, and 8 books on Shelf B. Some books are removed from Shelf B such that both shelves now have exactly the same number of books. How many books were removed from Shelf B?
A.1
B.2
C.3
D.4
Answer and explanation locked
142Logical Reasoningrank problem
Ahmed ranks 10th in the class of 46 students. There are only 7 students below Bilal rank wise. How many students are there between Ahmed and Bilal?
A.27
B.28
C.30
D.32
Answer and explanation locked
143Logical Reasoningfamily relationship
How is Ali related to Mustafa? If Ali says, "Mustafa's mother is the only child of my grandmother."
A.Brother
B.Cousin
C.Uncle
D.Father
Answer and explanation locked
144Logical Reasoningdata privacy moral argument
A mobile company is deciding whether to collect personal user data for improving advertisement. Which of the following is a moral argument against collecting the data?
A.Users may lose trust in the company, which could hurt profits.
B.It is wrong to collect data without users' clear and informed consent.
C.Competitors already collect more data, and we need to stay competitive.
D.More data means more accurate advertising, which boosts sales.
Answer and explanation locked
145Logical Reasoningage algebra
A father is 5 years older than twice his son's age. If the son is 12, what is the father's age?
A.28 years
B.29 years
C.30 years
D.32 years
Answer and explanation locked
146Logical Reasoningmissing number sequence
Which number comes in the missing place? 200, 180, 162, 146, 132, _____
A.118
B.120
C.122
D.126
Answer and explanation locked
147Logical Reasoningweight empty boxes
If 5 boxes of soap weigh 75 kilos and each box when empty weighs 3 kilos. What is total weight of the soaps?
A.15
B.30
C.45
D.60
Answer and explanation locked
148Logical Reasoninggeometric sequence halving
Consider the sequence: 64, 32, 16, 8, ... What is the 10th term of this sequence?