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

The mutation involving a substitution between non-complementary bases is called

Aframeshift mutation

Bdynamic mutation

Cfragment mutation

Dtransversion

Correct answer: D. transversion

Transversion refers to the substitution of one purine with another pyrimidine or vice versa, which involves non-complementary bases. The other options do not fit this description.

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Due to a mutation that changes a coding codon into a termination codon, such a mutation is known as Which of the following is not a term used to describe mutations in structural genes?Huntington gene's first exon shows (CAG)n repeats, with less than 35 repeats considered normal and more than 35 leading to Huntington disease. This mechanism of disease caused by the change in (CAG)n repeat number is known as Which mechanism generally causes only a change in gene expression levels?Which of the following can cause a frameshift mutation?