Assume That a Base-Pair Substitution Mutation Converts a DNA Triplet

question 78

Multiple Choice

Assume that a base-pair substitution mutation converts a DNA triplet (AAT) to another DNA triplet (AAA) . A second mutation now changes the AAA triplet to the GAA triplet. (UUA and CUU code for leucine and UUU codes for phenylalanine.) This second mutation is an example of a(n) :

• A) transversion.
• B) intragenic suppressor.
• C) loss-of-function mutation.
• D) intergenic suppressor.
• E) frameshift.

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