A mutation causes a G to be inserted after the first base of the codon for tryptophan.How will this affect the growing polypeptide chain?
A)It will not be affected.
B)Elongation will stop prematurely.
C)There will be a single amino acid substitution.
D)The reading frame will be shifted to the left,and the wrong amino acids will be added from this point on.
E)None of these

Question

Quizplus · Accepted Answer

The insertion of a G after the first base of the codon for tryptophan will shift the reading frame to the left, causing incorrect amino acids to be added from that point onwards. This will produce a completely different amino acid sequence, often rendering the resulting protein non-functional.

A Mutation Causes a G to Be Inserted After the First