Molecular Basis of Inheritance Question 94

94. Three codons causing chain termination are

(a) TAG, TAA, TGA

(b) GAT, AAT, AGT

(c) AGT, TAG, UGA

(d) UAG, UGA, UAA

Show Answer

Answer : d

Hints & Solution

(d) Termination codons are the stop signals which when encountered cause termination of polypeptide synthesis. They are UAA (ochre), UAG (amber) and UGA (opal). Codons are determined by the sequence of bases on the DNA. Thymine is not present on RNA.