First slide

Genetic Code

Question

Which of the following is correct regarding genetic code?

Easy

A

UUU is the initiation codon which also codes for phenylalanine
B

There are 64 triplet codons and only 20 amino acids
C

Three random nitrogen bases specify the placement of one amino acid
D

UAA is the nonsense codon which also codes for methionine

Solution

Genetic code has 64 codons in triplets which are meant for 20 amino acids. 61 are sense codons and the remaining 3 are non-sense codons.

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