Question

How many nucleotides does an ET codon contain?

(a) 2
(b) 3
(c) 4
(d) 5
(e) 6

Answer 1

(b) 3. The ET codon contains 3 nucleotides.

Step-by-step explanation:

The ET codon, which stands for termination or stop codon, contains 3 nucleotides.

Each nucleotide triplet in mRNA, also known as a codon, codes for either an amino acid or a termination signal in a nascent protein. There are a total of 64 possible combinations of nucleotide triplets, representing the 20 standard amino acids and 3 stop codons.

Therefore, the ET codon, like other codons, consists of 3 nucleotides.