MDCAT Biology MCQs by Chapter: Biomolecules, Bioenergetics & Coordination

A chapter-by-chapter sample of MDCAT Biology MCQs covering Biomolecules & Enzymes, Bioenergetics, and Coordination & Control — three chapters not included in our Cell Biology, Genetics & Reproduction set.

MDCAT Biology is the highest-weighted subject on the paper, and its syllabus runs well beyond Cell Biology and Genetics. Three more chapters are tested every year: Biomolecules & Enzymes, Bioenergetics, and Coordination & Control. Here's a chapter-by-chapter sample so you can see exactly where each concept sits.

Preparing for MDCAT? Practise explanation-backed MCQs in the MDCAT QBank. Your first 20 questions are free.

Chapter: Biomolecules & Enzymes

1. Enzymes are biological catalysts that are primarily made of:

A) Carbohydrates
B) Lipids
C) Proteins ✅
D) Nucleic acids

2. The monomer (building block) of proteins is the:

A) Fatty acid
B) Amino acid ✅
C) Nucleotide
D) Monosaccharide

3. An enzyme's specificity for its substrate is best explained by the:

A) Lock-and-key / induced-fit model ✅
B) Random collision model
C) Osmotic gradient model
D) Diffusion-only model

Chapter: Bioenergetics

4. The organelle primarily responsible for aerobic respiration and ATP production is the:

A) Chloroplast
B) Mitochondrion ✅
C) Ribosome
D) Golgi apparatus

5. Glycolysis, the first stage of cellular respiration, takes place in the:

A) Mitochondrial matrix
B) Cytoplasm (cytosol) ✅
C) Nucleus
D) Cell membrane

6. Photosynthesis converts light energy into chemical energy, stored primarily as:

A) Glucose ✅
B) Oxygen
C) Carbon dioxide
D) Water

Chapter: Coordination & Control

7. Communication between two neurons occurs at a junction called the:

A) Axon
B) Synapse ✅
C) Dendrite
D) Node of Ranvier

8. The part of the brain primarily responsible for coordinating balance and voluntary muscle movement is the:

A) Cerebrum
B) Medulla oblongata
C) Cerebellum ✅
D) Hypothalamus

9. A simple reflex action, such as withdrawing a hand from a hot surface, is processed primarily by the:

A) Cerebrum
B) Spinal cord ✅
C) Cerebellum
D) Pituitary gland

Why Chapter-by-Chapter Beats a Flat Question List

Biomolecules & Enzymes, Bioenergetics, and Coordination & Control sit in very different parts of the Biology syllabus but are all consistently represented on the paper. Working through them as separate chapters, each with an explanation, makes it easier to see which one actually needs more of your revision time rather than assuming you're "generally okay at Biology."

HighYield's MDCAT question bank is organised by subject and topic across all four MDCAT subjects, every question explained. For Cell Biology, Genetics, Reproduction and Support & Movement, see our first Biology chapter set, or for the concepts that repeat most often across all subjects, see Most Repeated MDCAT MCQs by Subject. Try the first 20 questions of the full bank free, no sign-in required, from the MDCAT question bank page.