AP BIOLOGY

HEREDITY

MUTATIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Observe the amino acid sequence below.Before:METHIONINE-VALINE-PROLINE-LYSINE-LEUCINEAfter:METHIONINE-VALINE-PROLINE-SERINE-LEUCINEWhat type of mutation is shown above?
A
deletion
B
insertion
C
substitution
D
frame shift
Explanation: 

Detailed explanation-1: -Orders of protein structure: primary, secondary, tertiary, and quaternary.

Detailed explanation-2: -This sequence of mRNA codes for the amino acids methionine-lysine-leucine-arginine-arginine-methionine-methionine-methionine. This sequence of mRNA codes for the amino acids methionine-lysine-leucine-arginine-arginine-methionine-methionine-methionine.

Detailed explanation-3: -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.

Detailed explanation-4: -1). Because an insertion or deletion results in a frame-shift that changes the reading of subsequent codons and, therefore, alters the entire amino acid sequence that follows the mutation, insertions and deletions are usually more harmful than a substitution in which only a single amino acid is altered.

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