AP BIOLOGY

HEREDITY

MUTATIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which types of point mutations mess up several amino acids?
A
Insertion
B
Substitution
C
Deletion
D
Silent
Explanation: 

Detailed explanation-1: -Missense Mutation A missense mutation is a DNA change that results in different amino acids being encoded at a particular position in the resulting protein. Some missense mutations alter the function of the resulting protein.

Detailed explanation-2: -Frameshift mutations Insertion or deletion of one or more nucleotides during replication can also lead to another type of mutation known as a frameshift mutation. The outcome of a frameshift mutation is complete alteration of the amino acid sequence of a protein.

Detailed explanation-3: -Nonsense Mutation A nonsense mutation occurs in DNA when a sequence change gives rise to a stop codon rather than a codon specifying an amino acid.

Detailed explanation-4: -A missense mutation is a point mutation that changes a codon to indicate a different amino acid. This usually changes the polypeptide and therefore can change the function of the overall protein. We call it a missense mutation because it causes the protein to be incorrectly translated from the original gene.

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