AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a silent mutation?
A
This begins every polypeptide chain
B
This does not code for an amino acid
C
This is a type of substitution mutation which does not change the amino acid sequence, This type of substitution mutation is not shown on the genetic level
Explanation: 

Detailed explanation-1: -A silent mutation is a type of substitution, or point, mutation, wherein the change in the DNA sequence of the gene has no effect on the amino acid sequence. For example, AAA (codes for the amino acid lysine, Lys) being mutated to AAG (which also codes for Lys).

Detailed explanation-2: -Silent mutations occur when the change of the DNA sequence within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the protein. 17−19. This change typically takes place at the third position of the codon also known as the wobble position.

Detailed explanation-3: -A silent mutation is a mutation that occurs within the DNA sequence, but does not alter the amino acid sequence. Silent mutations can occur in introns, which are spliced out before translation.

Detailed explanation-4: -Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene’s protein.

Detailed explanation-5: -So, the correct answer is ‘Silent mutation’.

There is 1 question to complete.