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 GGATCC
CCTAGG
Enzyme Recognition
EcoRI GAATTC
CTTAAG
Enzyme Recognition
HaeIII GGCC
CCGG
Enzyme Recognition
HindIII AAGCTT
TTCGAA
Enzyme Recognition PstI CTGCG
GACGTC
16 of 30
Which enzyme would cut this strand of DNA:
GCATGGATCCCAATGC?
Enzyme Recognition
BamHI GGATCC
CCCTAGG
Enzyme Recognition
EcoRI GAATTC
CTTAAG
Enzyme Recognition
HaeIII GGCC
CCGG
Enzyme Recognition
HindIII AAGCTT
TTCGAA
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