DNA Mutations Answers

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The DNA sequence reads ACGTTCATT before a mutation occurs. After the mutation, the DNA sequence reads ATCGTTCATT. Which type of mutation occurred?

A
substitution
B
insertion
C
deletion
D
point
22
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Which is considered a chemical mutagen?

A
tanning beds
B
tobacco
C
X-rays
D
sunlight
23

A point mutation changes the DNA sequence CGA to CGT, but the same protein is still produced. Which point mutation occurred?

A
nonsense
B
missense
C
silent
D
frameshift
24

Which statement is scientifically based?

A
Mutations rarely occur.
B
All mutations are harmful.
C
Some mutations can be contagious, like infections.
D
Mutations are not passed from parent to offspring.

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