Question 1

Transposons

Accepted Answer

A)  are informally known as jumping genes.
B)  may cause insertion mutations.
C)  may cause knockout mutations.
D)  were first recognized in plants.
E)  All of the choices are correct.F) A) and B)
G) A) and E)

Question 2

To maximize the number of thymine dimer mutations following UV exposure,should you keep human cells in tissue culture in the dark,in the light,or does it matter at all?

Accepted Answer

A)  The dark-light will activate the photorepair systems that can break thymine dimers induced by UV light.
B)  The light-it's important to keep on producing the thymine dimers by keeping the plate exposed to light as much as possible.
C)  It's best to alternate light and dark every hour to increase the chances that thymine dimers will form in the human cells,but still keep the photorepair systems from correcting them as they are formed.
D)  It doesn't matter-human cells don't possess the enzymes needed for photorepair of thymine dimers.E) All of the above
F) C) and D)

Question 3

Planar molecules used as chemical mutagens are called

Accepted Answer

A)  nitrous oxide.
B)  base analogs.
C)  alkylating agents.
D)  intercalating agents.E) C) and D)
F) B) and D)

Question 4

F plasmids and oftentimes R plasmids are both able to code for production of a pilus.

Accepted Answer

A) True 
 B)False

Question 5

The Ames test determines antibiotic sensitivity of a bacterium.

Accepted Answer

A) True 
 B)False

Question 6

The study of the crown gall tumor found

Accepted Answer

A)  a bacterial plasmid promoter that was similar to plant promoters.
B)  an R plasmid.
C)  incorporation of the bacterial chromosome into the plant.
D)  incorporation of the plant chromosome into the bacteria.E) All of the above
F) None of the above

Question 7

Transposons may leave a cell by incorporating themselves into a plasmid.

Accepted Answer

A) True 
 B)False

Question 8

Which is not true about a crown gall tumor?

Accepted Answer

A)  It is a bacterial infection of plants.
B)  It requires a plasmid.
C)  It produces a large amount of opines that neither the plant nor bacteria synthesizes.
D)  It is due to the incorporation of bacterial plasmid DNA into the plant chromosome.
E)  All of the choices are true.F) A) and C)
G) B) and D)

Question 9

Antibiotics

Accepted Answer

A)  cause mutations to occur.
B)  may act as alkylating mutagens.
C)  provide an environment in which preexisting mutants survive.
D)  increase the rate of spontaneous mutation.E) None of the above
F) B) and C)

Question 10

Double-stranded DNA enters the recipient cell during transformation.

Accepted Answer

A) True 
 B)False

Question 11

A clever technique that streamlines the identification of auxotrophic mutants is

Accepted Answer

A)  gas chromatography.
B)  replica plating.
C)  direct selection.
D)  reversion.E) A) and D)
F) B) and C)

Question 12

Plasmids often carry the information for antibiotic resistance.

Accepted Answer

A) True 
 B)False

Question 13

Direct selection involves inoculating cells onto growth media on which

Accepted Answer

A)  the mutant but not the parental cell type will grow.
B)  the mutation will be reversed.
C)  the nutrients necessary for mutation to occur are present.
D)  the mutagen is present.E) B) and D)
F) None of the above

Question 14

Competent cells

Accepted Answer

A)  are able to take up naked DNA.
B)  are antibiotic resistant.
C)  occur naturally.
D)  can be created in the laboratory.
E)  are able to take up naked DNA,occur naturally,AND can be created in the laboratory.F) B) and D)
G) B) and E)

Question 15

The formation of a covalent bond between two adjacent thymines is caused by

Accepted Answer

A)  mustard gas.
B)  alkylating agents.
C)  microwave radiation.
D)  UV radiation.E) B) and C)
F) A) and D)

Question 16

Irradiation of cells with ultraviolet light may cause

Accepted Answer

A)  four nucleotides to covalently bind together.
B)  thymine dimers.
C)  adenine complementary base pairing with cytosine.
D)  the addition of uracil.E) C) and D)
F) A) and D)

Question 17

DNA polymerase is able to proofread the DNA sequence.

Accepted Answer

A) True 
 B)False

Question 18

Thymine dimers are dealt with by

Accepted Answer

A)  no repair mechanisms.
B)  photoreactivation repair.
C)  SOS repair.
D)  excision repair.
E)  photoreactivation repair AND excision repair.F) A) and D)
G) All of the above

Question 19

DNA repair mechanisms occur

Accepted Answer

A)  only in prokaryotes.
B)  only in eukaryotes.
C)  in both eukaryotes and prokaryotes.
D)  in neither eukaryotes or prokaryotes.E) A) and B)
F) A) and C)

Exam 8: Bacterial Genetics

Thymine dimers are dealt with by

Correct Answer
verified

The formation of a covalent bond between two adjacent thymines is caused by

Correct Answer
verified

Planar molecules used as chemical mutagens are called

Correct Answer
verified

Which is not true about a crown gall tumor?

Correct Answer
verified

Direct selection involves inoculating cells onto growth media on which

Correct Answer
verified

Plasmids often carry the information for antibiotic resistance.

Correct Answer
verified

Transposons may leave a cell by incorporating themselves into a plasmid.

Correct Answer
verified

Double-stranded DNA enters the recipient cell during transformation.

Correct Answer
verified

DNA repair mechanisms occur

Correct Answer
verified

F plasmids and oftentimes R plasmids are both able to code for production of a pilus.

Correct Answer
verified

A clever technique that streamlines the identification of auxotrophic mutants is

Correct Answer
verified

To maximize the number of thymine dimer mutations following UV exposure,should you keep human cells in tissue culture in the dark,in the light,or does it matter at all?

Correct Answer
verified

The Ames test determines antibiotic sensitivity of a bacterium.

Correct Answer
verified

Transposons

Correct Answer
verified

Antibiotics

Correct Answer
verified

DNA polymerase is able to proofread the DNA sequence.

Correct Answer
verified

Competent cells

Correct Answer
verified

Irradiation of cells with ultraviolet light may cause

Correct Answer
verified

The study of the crown gall tumor found

Correct Answer
verified

Exam 8: Bacterial Genetics

Thymine dimers are dealt with by

Correct AnswerverifiedShow Answer

The formation of a covalent bond between two adjacent thymines is caused by

Correct AnswerverifiedShow Answer

Planar molecules used as chemical mutagens are called

Correct AnswerverifiedShow Answer

Which is not true about a crown gall tumor?

Correct AnswerverifiedShow Answer

Direct selection involves inoculating cells onto growth media on which

Correct AnswerverifiedShow Answer

Plasmids often carry the information for antibiotic resistance.

Correct AnswerverifiedShow Answer

Transposons may leave a cell by incorporating themselves into a plasmid.

Correct AnswerverifiedShow Answer

Double-stranded DNA enters the recipient cell during transformation.

Correct AnswerverifiedShow Answer

DNA repair mechanisms occur

Correct AnswerverifiedShow Answer

F plasmids and oftentimes R plasmids are both able to code for production of a pilus.

Correct AnswerverifiedShow Answer

A clever technique that streamlines the identification of auxotrophic mutants is

Correct AnswerverifiedShow Answer

To maximize the number of thymine dimer mutations following UV exposure,should you keep human cells in tissue culture in the dark,in the light,or does it matter at all?

Correct AnswerverifiedShow Answer

The Ames test determines antibiotic sensitivity of a bacterium.

Correct AnswerverifiedShow Answer

Transposons

Correct AnswerverifiedShow Answer

Antibiotics

Correct AnswerverifiedShow Answer

DNA polymerase is able to proofread the DNA sequence.

Correct AnswerverifiedShow Answer

Competent cells

Correct AnswerverifiedShow Answer

Irradiation of cells with ultraviolet light may cause

Correct AnswerverifiedShow Answer

The study of the crown gall tumor found

Correct AnswerverifiedShow Answer

Correct Answer
verified

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