What is the significance of a "stop codon"?
A)When it appears in messenger RNA,it is a signal to stop protein biosynthesis.
B)When it appears in transfer RNA,it is a signal to stop transferring amino acids to the growing protein chain.
C)When it appears in DNA,it is a signal to stop chromosome biosynthesis.
D)When it appears in a protein,it is a signal for the protein to unfold.
E)When it appears in ribosomal RNA,it is a signal to stop catalyzing protein biosynthesis.

Question

Quizplus · Accepted Answer

A stop codon is a sequence of three nucleotides (UAA, UAG, or UGA) in mRNA that signals the end of protein biosynthesis during translation. When a ribosome encounters a stop codon, it does not code for an amino acid but instead signals the termination of protein synthesis. This is the significance of a stop codon in messenger RNA.

What Is the Significance of a "Stop Codon