Carbohydrates proteins lipids nucleic acids

NCERT Biology Class 11, Chapter 9

Which of the following statements about structural domains is correct? NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

Which of the following statements about structural domains is correct?

AStructural domains are local folded regions at the tertiary structure level based on secondary or supersecondary structures in polypeptide chains
BStructural domains are independent, three-dimensional units of folding in globular proteins, fibrous and loosely packed
CAfter protease hydrolysis, structural domains change their conformation once separated from the overall protein structure
DMost structural domains contain more than 200 consecutive amino acid residues, with an average diameter of 2.5nm

Correct answer: A. Structural domains are local folded regions at the tertiary structure level based on secondary or supersecondary structures in polypeptide chains

Structural domains are local folded regions at the tertiary structure level based on secondary or supersecondary structures in polypeptide chains.

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