Mutation and gene expression

NCERT Biology Class 12, Chapter 5

Mutation and gene expression NEET Biology MCQ

Last updated: July 30, 2026

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

Which of the following statements about molecular and cellular biological effects caused by gene mutations and chromosomal abnormalities is incorrect?

AGene mutation alters the quantity and quality of the encoded polypeptide chain
BChromosomal abnormality alters the quantity and quality of the encoded polypeptide chain
CThe molecular and cellular biological effects caused by gene mutations and chromosomal abnormalities are completely identical
DThe molecular and cellular biological effects caused by gene mutations involve a relatively smaller scope

Correct answer: C. The molecular and cellular biological effects caused by gene mutations and chromosomal abnormalities are completely identical

Gene mutations and chromosomal abnormalities can both affect the quantity and quality of polypeptide chains, but their effects are not entirely identical. Gene mutations typically have more localized impacts compared to broader changes caused by chromosomal abnormalities.

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