Biology Biomolecules UHS 2024
PMDC Verified Question 6 of 142
Which monosaccharide will form a gluco pyranose ring in solution?
A
Fructose
B
Glucose
C
Ribose
D
Deoxyribose
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Glucose
Concept:

Chemical nomenclature directly indicates the specific molecule and ring size.

Solution:

  • The term "gluco-" specifically and exclusively refers to the sugar Glucose.


  • The term "-pyranose" indicates that upon entering an aqueous solution, the molecule has formed a stable 6-membered ring (resembling the organic molecule pyran).


  • Therefore, a "glucopyranose" ring is simply the standard, cyclic form of a Glucose molecule.


Why other options are incorrect:

  • Fructose: Typically forms a 5-membered "fructo-furanose" ring.


  • Ribose / Deoxyribose: 5-carbon sugars that exclusively form 5-membered "furanose" rings.

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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