Biology Biomolecules UHS 2024
PMDC Verified Question 26 of 142
When glycerol reacts with fatty acid, which type of chemical bond will form?
A
Ester Bond
B
Ether Linkage
C
Hydrogen Bond
D
Ionic Bond
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Ester Bond
Concept:

Lipid synthesis is defined by the reaction between an alcohol group and a carboxylic acid group.

Solution:

  • Glycerol contains reactive hydroxyl (alcohol, \(-OH\)) groups.


  • Fatty acids contain reactive carboxylic acid (\(-COOH\)) heads.


  • When these two specific functional groups undergo a condensation reaction to join together, they release water and form a robust \(-C-O-C(=O)-\) covalent bridge.


  • In organic chemistry, this specific linkage connecting an acid to an alcohol is universally termed an Ester Bond.


Why other options are incorrect:

  • Ether Linkage: Formed between two alcohols (\(-C-O-C-\)), such as the glycosidic bond in sugars.


  • Hydrogen/Ionic Bonds: Weak physical attractions, not covalent synthetic bonds.

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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