Biology Biomolecules UHS 2023
PMDC Verified Question 65 of 142
Cells of different types can be distinguished on the basis of surface.
A
Phospholipids
B
Globular proteins
C
Glycolipids and glycoprotein
D
Cholesterol
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Glycolipids and glycoprotein
Concept:

Cell-to-cell recognition relies on highly specific molecular "name tags" sticking out from the outer membrane leaflet.

Solution:

  • Attached to the exterior surface of the plasma membrane are branching carbohydrate chains bound to either lipids (Glycolipids) or proteins (Glycoproteins).


  • These unique, complex "sugar coatings" (the glycocalyx) act as highly specific biological markers. They allow the immune system to distinguish "self" from "non-self" and help tissues organize, effectively distinguishing different cell types.


Why other options are incorrect:

  • Phospholipids & Cholesterol: These are generic, ubiquitous structural components shared identically across almost all mammalian cell membranes; they offer no unique identification.


  • Globular proteins: While they serve functions (channels/receptors), it is specifically the attached carbohydrate chains (glyco-) that provide the complex combinatorial "ID tags" for cell recognition.

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.

Previous Question All Biomolecules MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App