AnswersLHS Biology 1DNA Mutations

DNA Mutations Answers

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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
2
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Which type of mutation occurs only in reproductive cells?

A
somatic mutation
B
germline mutation
C
point mutation
D
frameshift mutation
3

Based on scientific research, which statement best describes mutations?

A
Mutations are rare occurrences.
B
Mutations are always harmful.
C
Mutations cannot be inherited.
D
Mutations cannot be acquired.
4

Which best describes somatic mutations?

A
They are usually passed on to offspring.
B
They can cause different kinds of cancer.
C
They always result from point mutations.
D
They only occur in reproductive cells.
5

Which type of mutation occurs only in gametes?

A
germline mutation
B
somatic mutation
C
point mutation
D
frameshift mutation
6

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.
7

Which best describes genetic mutations?

A
Some inherited genetic mutations can be good for the offspring.
B
Different genetic mutations cause few forms of cancer.
C
Somatic mutations can be inherited from parents or acquired during life.
D
Genetic mutations that cause diseases are always passed on to offspring.
8

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
9

Which is a point mutation and not a frameshift mutation?

A
mutagen
B
insertion
C
deletion
D
silent
10

Which is considered a chemical mutagen?

A
tanning beds
B
tobacco
C
X-rays
D
sunlight
11

Ji wants to write an example of a frameshift mutation using the following sentence: THE CAT SAW THE RAT. Which sentence best shows a frameshift mutation?

A
THC ATS AWT HER AT.
B
CAT THE SAW RAT THE.
C
EHT TAC WAS EHT TAR.
D
THE THE CAT SAW THE RAT.

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DNA Mutations Answers — LHS Biology 1