AP BIOLOGY

HEREDITY

MUTATIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a mutation changes a complete piece of DNA so that its sequence reads CGACCTCAA instead of CGACCTGAA, which would occur?
A
an amino acid deletion resulting in a shorter protein
B
a base pair substitution resulting in a different protein
C
an amino acid substitution resulting in a different protein
D
a frameshift mutation resulting in multiple amino acid changes within the protein
Explanation: 

Detailed explanation-1: -The correct answer is silent mutation . There are sequences present in the body where a point mutation occurs but the protein formed is still the same .

Detailed explanation-2: -A point mutation changes the DNA sequence CGA to CGT, but the same protein is still produced.

Detailed explanation-3: -change a codon to one that encodes the same amino acid and causes no change in the protein produced. These are called silent mutations. change an amino-acid-coding codon to a single “stop” codon and cause an incomplete protein. This can have serious effects since the incomplete protein probably won’t function.

Detailed explanation-4: -Genetic mutations are changes to your DNA sequence that happen during cell division when your cells make copies of themselves. Your DNA tells your body how to form and function. Genetic mutations could lead to genetic conditions like cancer, or they could help humans better adapt to their environment over time.

There is 1 question to complete.