Question

Which of the following statements about the genetic code is true?

A) A single gene contains only those nucleotides that code for a single protein.
B) Termination codons do not code for amino acids.
C) The tRNA anticodon is complementary to the mRNA codon, and therefore is ALWAYS identical to the DNA triplet word.
D) The promoter sequence is found on the antisense strand of DNA.
E) A single codon may code for more than one amino acid.

Answer 1

The correct statement about the genetic code is B) Termination codons do not code for amino acids.

Step-by-step explanation:

The genetic code consists of 64 possible mRNA codons. Among these, three codons, UAA, UAG, and UGA, serve as termination or stop codons. When these codons are reached during translation, they do not code for any amino acid. Instead, they signal the end of protein synthesis. For example, if the mRNA sequence contains the codon UAA, the ribosome will recognize it as a stop codon and protein synthesis will terminate at that point.