Biology Biomolecules MDCAT 2016
PMDC Verified Question 136 of 142
The compounds which, on hydrolysis, yield polyhydroxy aldehyde or ketone subunits are:
A
Carbohydrates
B
Proteins
C
Polynucleotides
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: Carbohydrates
Concept:

Chemical definition of a specific macromolecule class.

Solution:

  • By strict biochemical definition, Carbohydrates are either direct polyhydroxy aldehydes (aldoses) or polyhydroxy ketones (ketoses), or they are larger complex substances (like di- or polysaccharides) that yield these exact simple sugar subunits upon hydrolysis.


Why other options are incorrect:

  • Proteins: Yield amino acids upon hydrolysis.


  • Lipids: Yield fatty acids and glycerol (or other alcohols).


  • Polynucleotides: Yield nucleotides (sugar, phosphate, base).

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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