1Biologyenzyme conditions
Most enzymes have and optimum temperature of around
- A.30oC
- B.40oC
- C.50oC
- D.20oC
Answer and explanation locked
Enzymes MCQs for MDCAT
2 Enzymes questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.
2 questionsBiology
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2 more questions in this chapter
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2Biologyenzyme catalysis
Enzymes work by lowering the ___ of the reactions that catalyze
- A.Kinetic energy
- B.Activation energy
- C.Heat energy
- D.Potential energy
Answer and explanation locked
How Enzymes is examined
Enzymes sits in the official PMDC Biology curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.
Biology carries 81 of the 180 questions in the real paper - 45% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 81questions are split across chapters, so no honest page can tell you “expect four from Enzymes”. What the archive can tell you is what actually appeared: 2 Enzymes questions out of the 77 Biology questions digitised so far.
That is a thin sample, and it is worth saying so plainly rather than dressing it up: with this few questions, the count tells you very little about how heavily Enzymes is examined. It grows as the remaining papers are digitised.
Frequently asked questions
How many Enzymes MCQs are on this page?
2, drawn from one past paper - the 2020 paper. Every one is transcribed from the real paper rather than written to look like a past paper question, and each carries the correct answer with a written explanation. 0 of them are readable in full without an account.
Is Enzymes in the MDCAT 2026 syllabus?
Yes. Enzymes is a chapter of the official PMDC Biology curriculum, and PMDC has confirmed the 2026 syllabus is unchanged from the 2025 revision, so everything on this page is still examinable.
How many Enzymes questions come up in the MDCAT?
PMDC does not publish a per-chapter breakdown, so nobody can tell you a reliable number - be careful with pages that do. What can be counted is the paper as a whole: Biology is 81 of the 180 questions, and 3% of the Biology questions in our archive so far have come from Enzymes.
Do these Enzymes MCQs come with explanations?
Yes, and they are written from scratch rather than copied. An answer letter tells you nothing about why the other three options are wrong, which is the part that transfers to the next question. The first 0 questions of every paper are free to read in full; the rest need a pass.
This chapter has too few questions in the archive to be a useful search result yet, so it is not submitted for indexing. It becomes a full page as the remaining papers are digitised.