MDCAT Biology

≈ 81 of 180 MDCAT questions

Nearly half the paper comes from Biology. Get it solid and the rest of the exam feels lighter.

Biology carries roughly 81 of the 180 questions, which is close to half the paper. No other subject moves your aggregate as much, and that is why serious candidates give it the biggest slice of their day even when Chemistry feels scarier.

The questions reward detail. Cell structures, genetics crosses, the human systems you did in second-year FSc: it all comes back, but as MCQs with four close options instead of long questions. Ratta alone will not hold under time pressure; you need enough practice that the details stay sorted when the clock is running.

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

Have a go. Pick an answer and the explanation appears, exactly as it does 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

✓Diagrams first. Labelled structures and step-by-step processes get tested straight off the figure.
✓Genetics ratios should be automatic: 3:1 monohybrid, 9:3:3:1 dihybrid.
✓Do a set of Biology MCQs every day and actually read why the wrong options are wrong. That reading is where the marks come from.

MDCAT Biology: your questions

How many Biology questions are on the MDCAT?: Around 81 of 180. It is the largest section by far.
Which Biology topics carry the most weight?: Cell biology, biomolecules and enzymes, genetics, and human physiology come up year after year. Cover these properly before you touch the niche chapters.
How should I revise Biology for the MDCAT?: Topic-wise MCQs, honestly. Read the explanation for every question, including the ones you got right, and keep re-testing the chapters where your accuracy dips. Reading the textbook a third time feels productive but tests nothing.

Next steps: once you know where Biology fits, see the MDCAT score you actually need with the aggregate & merit calculator, check the full syllabus, or fit it into a 6-week plan.

Practise Biology, properly

Topic-wise Biology MCQs with explanations, full mock tests, and analytics that point at the topics costing you marks. Free to start.

Start practising, free