Question

1 of 30

What product of transcription serves as the code for synthesizing new proteins through the process of translation?

A new strand of DNA

rRNA

tRNA

mRNA

None of the above

2 of 30

An enzyme produced in response to the presence of a substrate is called ________.

an inducible enzyme

a repressible enzyme

a restriction enzyme

an operator

a promoter

3 of 30

Transformation is the transfer of DNA from a donor to a recipient cell ________.

by a bacteriophage

as naked DNA in solution

by cell-to-cell contact

by crossing over

by sexual reproduction

4 of 30

Genetic change in bacteria can be brought about by ________.

mutation

conjugation transduction

transformation

All of the above

5 of 30

Which of the following is not true of a bacterium that is R+?

R+ refers to the possession of a plasmid.

R+ can be transferred to a recipient cell.

It is resistant to certain drugs and heavy metals.

It is F+.

None of the above

6 of 30

According to the operon model, for the synthesis of an inducible enzyme to occur, the ________.

end-product must not be in excess

substrate must bind to the enzyme

substrate must bind to the repressor

repressor must bind to the operator

repressor must not be synthesized

7 of 30

Synthesis of a repressible enzyme is stopped by ________.

the allosteric transition

the substrate binding to the repressor

the corepressor binding to the operator

the corepressor-repressor binding to the operator

the end-product binding to the promoter Figure 8.2

8 of 30

In Figure 8.2, if base 4 is thymine, what is base 4′?

Adenine

Thymine

Cytosine

Guanine

Uracil

9 of 30

In Figure 8.2, if base 4 is thymine, what is base 11′?

Adenine

Thymine

Cytosine

Guanine

Uracil

10 of 30

In Figure 8.2 shows a figure of an unwound segment of DNA being replicated, base 2 is attached to _________.

ribose

phosphate

deoxyribose

thymine

Can’t tell

11 of 30

The reaction catalyzed by reverse transcriptase is ________.

DNA mRNA

mRNA cDNA

mRNA protein

DNA DNA

None

12 of 30

Subunit vaccines can be made by genetic engineering of yeast cells. A side effect of this kind of vaccination might be ________.

the disease

a yeast infection

due to extraneous material

that the vaccine doesn’t provide immunity

None of the above

13 of 30

E. coli can make insulin because ________.

it needs to regulate its cell-glucose level

it’s an ancient gene that now has no function

the insulin gene was inserted into it

it picked up the insulin gene from another cell

No reason; it doesn’t make insulin.

14 of 30

The value of cDNA in genetic engineering is that ________.

it lacks exons

it lacks introns

it’s really RNA

None of the above

15 of 30

Which enzyme does not make sticky ends?

Enzyme Recognition

BamHI GGATCC

CCTAGG

Enzyme Recognition

EcoRI GAATTC

CTTAAG

Enzyme Recognition

HaeIII GGCC

CCGG

Enzyme Recognition

HindIII AAGCTT

TTCGAA

Enzyme Recognition PstI CTGCG

GACGTC

16 of 30

Which enzyme would cut this strand of DNA:

GCATGGATCCCAATGC?

Enzyme Recognition

BamHI GGATCC

CCCTAGG

Enzyme Recognition

EcoRI GAATTC

CTTAAG

Enzyme Recognition

HaeIII GGCC

CCGG

Enzyme Recognition

HindIII AAGCTT

TTCGAA

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