Biology Enzymes ETEA 2022
PMDC Verified Question 42 of 79
Enzymes are ____ in nature.
A
Proteins
B
Carbohydrates
C
Vitamins
D
Lipids
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Proteins
Concept:

Enzymes are biological macromolecules constructed from specific monomeric subunits that allow them to fold into highly complex, active structures.

Solution:

  • Almost all known biological enzymes are proteinaceous in nature (with the rare exception of ribozymes, which are RNA).
  • They are composed of long chains of amino acids that fold into a tertiary or quaternary structure, which creates the functional active site.


Why other options are incorrect:

Carbohydrates, lipids, and vitamins do not form the structural backbone of enzymes. (Vitamins often act as precursors to coenzymes, but are not the enzyme itself).

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