Lesson 4: DNA Mutations Answers

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Which is a point mutation and not a frameshift mutation?

A
mutagen
B
insertion
C
deletion
D
silent
22
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Many different types of mutations can occur within the body. Tay-Sachs disease is a deadly disorder that is caused by a missing codon in the gene coding for production of the hex A enzyme in the body. Which type of mutation is responsible for causing Tay-Sachs disease?

A
substitution
B
replacement
C
insertion
D
deletion
23

Which type of mutation always produces a stop codon?

A
missense
B
nonsense
C
silent
D
point
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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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