DNA Mutations

Question 1

Which is considered a chemical mutagen?

Revolt · Accepted Answer

tobacco

Question 2

Which statement is scientifically based?

Revolt · Accepted Answer

Mutations rarely occur.

Question 3

Which best describes somatic mutations?

Revolt · Accepted Answer

They can cause different kinds of cancer.

Question 4

A mutagen is

Revolt · Accepted Answer

an agent that causes a mutation in DNA.

Question 5

Which type of mutation occurs only in gametes?

Revolt · Accepted Answer

germline mutation

Question 6

Based on scientific research, which statement best describes mutations?

Revolt · Accepted Answer

Mutations are rare occurrences.

Question 7

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?

Revolt · Accepted Answer

The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.

Question 8

Many different types of mutations can occur within the body. Sickle cell anemia is a disease that occurs when a mutation in a base pair of the hemoglobin beta gene causes a single replacement of the amino acid glutamic acid by the amino acid valine. As a result of this mutation, the individual’s blood cells take on a sickle shape under certain conditions and form clusters that can block blood vessels and cause organ damage. Which type of mutation causes sickle cell anemia?

Revolt · Accepted Answer

missense

Question 9

Which type of mutation occurs only in reproductive cells?

Revolt · Accepted Answer

germline mutation

Question 10

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

Revolt · Accepted Answer

silent

DNA Mutations Answers

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