A single nucleotide within a gene is changed by ultra-violet radiation exposure but the resulting protein.....

A single nucleotide within a gene is changed by ultra-violet radiation exposure but the resulting protein is still function. This is called ___________.



a) a transposon event

b) a point mutation

c) a frameshift mutation

d) a carcinogenic event

A single nucleotide within a gene is changed by ultra-violet radiation exposure but the resulting protein.....
Lil Butterfly,

The answer is “B” - point mutation, which is a mutation confined to a single nucleotide - known as a single nucleotide base change in the DNA. A point mutation may consist of the loss of a nucleotide, the insertion of an additional nucleotide, or the substitution of one nucleotide for another.



Hope this helps

matador 89
Reply:Lil Butterfly,

OK, you're welcome. I wonder who is marking your papers. It may be best if you do not have to take an oral test/exam - you just may have problems!!

m.89 Report It
Reply:Point mutation



The fact that the protein still functions is irrelevant. The important thing is that a SINGLE nucleotide was changed. That is the definition of a point mutation.
Reply:Point mutation.