DNA Mutations — Unit test

Question 1

Question is locked

Revolt · Accepted Answer

2 chromosomes are labeled a and a.

Question 2

Which is not something that occurs in translation?

Revolt · Accepted Answer

A molecule of mRNA is formed.

Question 3

Missense, nonsense, and silent mutations are examples of which type of mutation?

Revolt · Accepted Answer

substitution

Question 4

Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base in a mRNA strand, but during translation the mRNA strand still creates the same protein. Which type of mutation is responsible for the change in the mRNA base?

Revolt · Accepted Answer

silent

Question 5

Which does not occur during translation?

Revolt · Accepted Answer

DNA is transcribed into a complementary strand of mRNA.

Question 6

Which step in transcription occurs first?

Revolt · Accepted Answer

RNA polymerase attaches to the promoter.

Question 7

Which base is found only in DNA?

Revolt · Accepted Answer

thymine

Question 8

What does a karyotype show?

Revolt · Accepted Answer

genetic abnormalities

Question 9

Question is locked

Revolt · Accepted Answer

homologous chromosomes with heterozygous alleles

Question 10

A mutation causes a sequence of DNA that has the nucleotides TTG to be changed to TCG. The resulting protein has a different sequence of amino acids. Which type of mutation is this?

Revolt · Accepted Answer

missense

DNA Mutations — Unit test Answers

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