AnswersTX-Biology A-ACC RISD QuestDNA Mutations

DNA Mutations — Unit test Answers

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What is the function of tRNA?

A
to code for protein synthesis
B
to carry the synthesized genetic information from the nucleus to the ribosomes
C
to synthesize proteins from RNA
D
to bring amino acids to the ribosomes to be assembled into proteins
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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.
25

A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory. Which statement best provides evidence that the substance is a mutagen?

A
The cells die within hours of being exposed to the chemical.
B
The cells grow more quickly than those that were not exposed to the chemical.
C
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
D
The cells continue to divide at the same rate as before they were exposed to the chemical.

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