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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance2 Marks
Question
Three codons on mRNA are not recognised by transfer RNA. What are they? What is the general term used for them? What is their significance in protein synthesis?
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Answer

These codons are UAA, UAG and UGA. The general name given to these codons is nonsense codons. These codons do not specify any amino acid but the termination of polypeptide chain is signalled by them.

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