Question

In which of the following cases the first base of anticodon pairs with three codons?

(a) When the first base of anticodon is A or C

(b) When the first base of anticodon is A or G

(c) When the first base of anticodon is inosine

(d) When the first base of anticodon is G or U

The question was posed to me in final exam.

Asked question is from The Genetic Code topic in section DNA, RNA and Protein Metabolism of Biochemistry

Answer 1

The correct option is (c) When the first base of anticodon is inosine

To explain: When inosine is the first nucleotide of an anticodon, three different codons can be recognized.