Carbohydrates proteins lipids nucleic acids

NCERT Biology Class 11, Chapter 9

Which of the following statements about genetic codes is incorrect? NEET Biology MCQ

Last updated: July 30, 2026

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

Which of the following statements about genetic codes is incorrect?

AGenetic codes have species specificity, so different organisms synthesize different proteins
BThe reading frame of genetic codes has directionality, starting from the 5' end and ending at the 3' end
COne amino acid can have more than one codon
DThe third base (i.e., 3' end) of a codon is less important in determining the specificity of the incorporated amino acid

Correct answer: A. Genetic codes have species specificity, so different organisms synthesize different proteins

Genetic codes are universal and not specific to species, hence different organisms synthesize similar proteins based on the same genetic code.

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