UNIT 03 :
BIOLOGICAL MOLECULES
Biological Molecules is one of the foundational chapters in MDCAT Biology, sitting within the 45% Biology allocation of your 81-question paper.
What this chapter covers:
- Define and classify biological molecules
- Discuss the importance of biological molecules
- Biological importance of water
- Carbohydrates: monosaccharides, oligosaccharides, polysaccharides
- Proteins: amino acids, structure of proteins
- Lipids: phospholipids, triglycerides, alcohol and esters
- Ribonucleic acid (RNA): structure and function
- Conjugated molecules
- Structure of DNA as proposed by Watson and Crick
- Gene as a sequence of nucleotides coding for a polypeptide
This chapter is heavily conceptual and definition-driven rather than calculation-based, built on precise terminology, structural relationships, and named examples that must be recalled exactly, placing it mostly in the easy-to-moderate range with pockets of difficulty around protein structural levels, DNA base pairing, and biomolecule classification. Mastery here depends less on solving problems and more on holding a large web of interrelated names, structures, and mechanisms clearly distinct in memory.
Why this practice set helps:
- Covers every subtopic the PMDC curriculum identifies, plus the supporting concepts textbooks present alongside them
- Every question includes a full explanation of why the correct answer is right and why each other option is wrong
- Built to help you learn faster than passive reading, with nothing the exam may draw from left untouched
Work through this set attentively, and you build the precise recall and conceptual clarity this chapter demands.