MDCAT Chemistry — Macromolecules
Macromolecules is a core Chemistry topic in the PMDC MDCAT syllabus, covering 4 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (4)
- Carbohydrates
- Classification and Structure of Proteins
- Enzymes as Biocatalysts
- Importance of Proteins
How Macromolecules is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Macromolecules accounts for 62 questions. It appears in all 16, about 3.9 questions a paper. The heaviest was MDCAT 2013, with 11 questions, and the most recent is MDCAT 2025, with 1.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 1 |
| MDCAT 2024 | 1 |
| MDCAT 2023 | 2 |
| MDCAT 2022 | 3 |
| MDCAT 2019 | 3 |
| MDCAT 2018 | 3 |
| MDCAT 2017 | 3 |
| MDCAT 2016 | 1 |
| MDCAT 2015 | 5 |
| MDCAT 2014 | 3 |
| MDCAT 2013 | 11 |
| MDCAT 2012 | 9 |
| MDCAT 2011 | 8 |
| MDCAT 2010 | 3 |
| MDCAT 2009 | 4 |
| MDCAT 2008 | 2 |
Macromolecules MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Macromolecules
An enzyme used to decompose lipids into fatty acids in our alimentary canal is
- A.Amylase
- B.Protease
- C.Lipase
- D.Urease
Show answer
Answer: C. Lipase — Lipase breaks down lipids into fatty acids (and glycerol).
- Q2 · MDCAT 2024 · Macromolecules
Which one of the following is not an amino acid
- A.Folic acid
- B.Glutamic acid
- C.Glycine
- D.Lysine
Show answer
Answer: A. Folic acid — Folic acid is a vitamin (B9), not an amino acid — unlike glutamic acid, glycine, and lysine.
- Q3 · MDCAT 2023 · Macromolecules
Competitive inhibitors stop an enzyme from working by:
- A.Changing the shape of the enzyme
- B.Merging with the substrate instead
- C.Blocking the active site of the enzyme
- D.Combining with the product of the reaction
Show answer
Answer: C. Blocking the active site of the enzyme — Competitive inhibitors work by physically blocking the enzyme's active site, preventing the substrate from binding.