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Chapter 3 of 16 · Biology

Enzymes

Enzymes is a Biology chapter on the official PMDC MDCAT 2026 syllabus, contributing roughly 4 MCQs to the 81-MCQ Biology section. Mastering the core concepts below typically secures the full chapter weightage.

Key Concepts

  • Active site & specificity
  • Lock & key vs induced fit
  • Factors affecting activity
  • Inhibition (competitive/non-competitive)
  • Cofactors & coenzymes

How Enzymes Is Tested

MDCAT questions on Enzymes are a mix of recall (definitions, classifications), application (predict outcomes, interpret diagrams), and basic numerical/analytical reasoning. PMDC papers from 2020–2025 emphasized the concepts above; older UHS papers (2008–2019) tested them too, with slight variations in question framing.

Practice

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Cell Division