Chemistry Macromolecules / Biochemistry SZABMU 2022
PMDC Verified Question 23 of 47
Based on function, thyroxin can be classified as
A
Transport protein
B
Structural protein
C
Hormonal protein
D
Genetic protein
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Hormonal protein
Concept:

Biomolecules (including amino acid derivatives) are classified by their physiological roles, such as transport, structure, or regulation.

Formula:

$$N/A$$

Solution:

  • Thyroxin (T4) is secreted by the thyroid gland and travels through the bloodstream to target organs, regulating base metabolic rate.
  • Because it functions as a chemical messenger regulating body processes, it falls under the functional classification of a hormonal protein (or biologically active amino acid derivative).


Why other options are incorrect:

It does not provide physical structure (structural), transport molecules like oxygen (transport), or interact directly with DNA packaging (genetic).

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