Biology Biomolecules SZABMU 2023
PMDC Verified Question 60 of 142
Three hydrophobic fatty acid tails and a glycerol molecule join to form a:
A
Diglyceride
B
Phospholipid
C
Triglyceride
D
Monoglyceride
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Triglyceride
Concept:

Biological nomenclature directly reflects the stoichiometry of the molecule's constituents.

Solution:

  • The prefix "Tri-" means three.


  • When a single glycerol molecule undergoes dehydration synthesis to bond covalently via ester linkages to exactly three fatty acid tails, it forms a massive, fully non-polar lipid used for energy storage.


  • By direct definition, this molecule is a Triglyceride (Triacylglycerol).


Why other options are incorrect:

  • Mono/Diglyceride: Contain 1 and 2 fatty acids, respectively.


  • Phospholipid: Contains exactly 2 fatty acids. The third spot on the glycerol is occupied by a polar phosphate group instead of a third tail.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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