How many Biology questions are on the MDCAT?

Around 81 of the 180 questions — the largest single section, which is why Biology is the highest-leverage subject to master.

Which Biology topics carry the most weight?

Cell biology, biomolecules and enzymes, genetics, and human physiology are consistently heavy. Cover these thoroughly before niche topics.

How should I revise Biology for the MDCAT?

Work through topic-wise MCQs, read the explanation for every question (right or wrong), and re-test your weak topics until your accuracy climbs.

MDCAT Biology

≈ 81 of 180 MDCAT questions

The biggest section of the MDCAT — and where most of your marks are won or lost.

Biology is the largest part of the MDCAT, making up roughly 81 of the 180 questions. A strong Biology score lifts your aggregate more than any other subject, so it deserves the bulk of your preparation time.

The questions are concept-heavy and detail-rich, spanning cell biology, genetics, human physiology and more. Practising MCQs with worked explanations is the fastest way to turn textbook recall into exam-ready answers.

What’s covered in MDCAT Biology

•Cell biology & biomolecules
•Enzymes
•Bioenergetics — respiration & photosynthesis
•Genetics & inheritance
•Evolution & variation
•Biodiversity & classification
•Human physiology — digestion, circulation, nervous & endocrine systems
•Reproduction
•Ecology

Sample Biology MCQs

Try a few — pick an answer to see the worked explanation, just like inside the app.

Which organelle is the site of aerobic respiration?

The fluid-mosaic model describes the structure of the:

A cross between two heterozygous tall plants (Tt) gives what genotypic ratio?

How to prepare for MDCAT Biology

✓Master labelled diagrams and step-by-step processes — they’re tested directly.
✓Learn the genetics ratios cold (monohybrid 3:1, dihybrid 9:3:3:1).
✓Build recall with daily MCQs and review the explanation for every wrong answer.

MDCAT Biology — FAQs

How many Biology questions are on the MDCAT?: Around 81 of the 180 questions — the largest single section, which is why Biology is the highest-leverage subject to master.
Which Biology topics carry the most weight?: Cell biology, biomolecules and enzymes, genetics, and human physiology are consistently heavy. Cover these thoroughly before niche topics.
How should I revise Biology for the MDCAT?: Work through topic-wise MCQs, read the explanation for every question (right or wrong), and re-test your weak topics until your accuracy climbs.

Practise Biology the smart way

Get topic-wise Biology MCQs with explanations, full mock tests, and analytics that show exactly which topics to fix — free to start.

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