Chemistry Macromolecules / Biochemistry UHS 2022
PMDC Verified Question 22 of 47
Which of the following proteins acts as carrier of Cu in blood plasma?
A
Ceruloplasmin
B
Haemoglobin
C
Glycoprotein
D
Histone
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Ceruloplasmin
Concept:

Specific transport proteins in the blood plasma are responsible for safely carrying metal ions to prevent toxicity and facilitate systemic delivery.

Formula:

$$N/A$$

Solution:

  • Copper (Cu) is a vital trace mineral, but free copper ions are highly toxic.
  • In the blood plasma, over 90% of circulating copper is bound to a specific transport and ferroxidase protein called ceruloplasmin.


Why other options are incorrect:

Haemoglobin carries oxygen and contains iron (Fe), not copper. Histones are nuclear proteins that pack DNA. Glycoprotein is a broad structural category (though ceruloplasmin is technically a glycoprotein, 'ceruloplasmin' is the exact, specific carrier name).

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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