A point mutation in a gene's promoter will most likely cause the production of:
A)a shortened mRNA and a truncated protein.
B)a shortened mRNA and a wild-type protein.
C)reduced amounts of mRNA and protein.
D)reduced amounts of mRNA and wild-type amounts of protein.
E)wild-type amounts of mRNA and reduced amounts of protein.

Question

Quizplus · Accepted Answer

A promoter mutation could affect the efficiency of transcription initiation, resulting in reduced mRNA production. Lower levels of mRNA would then lead to reduced protein production, but the protein would likely be wild-type since the mutation did not impact the coding sequence. A point mutation in the promoter would not affect the splicing of the mRNA or the length of the protein.

A Point Mutation in a Gene's Promoter Will Most Likely