
BIOL 221 L14

Quiz
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Science
•
University
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Medium
Standards-aligned
Riya Verma
Used 14+ times
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35 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why must the lagging strand at a replication fork be replicated in short fragments?
DNA is always replicated in short fragments.
The slower replication requires DNA polymerase to start at several different places.
It is being replicated 3’ to 5’, which is backwards and slower than 5’ to 3’.
It is replicated toward the origin, but the fork is opening away from the origin.
There are several DNA polymerase molecules on the lagging strand.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which enzyme relieves the tension in DNA caused by unwinding the helix to replicate it?
DNA polymerase
DNA gyrase
DNA ligase
DNA transcriptase
Okazaki enzyme
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is needed to replicate DNA, but is NOT needed to make RNA from DNA?
nucleoside triphosphates
a primer
a template
an enzyme
a free 5’ OH
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a prokaryotic RNA polymerase recognize a promoter?
It binds to a Shine-Dalgarno sequence
It binds to the 5’ end of the DNA
It recognizes a “start” codon
It binds to a sequence called an “origin of replication”
Its sigma subunit binds to consensus sequences at -10 and -35
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The following segment of double stranded DNA is transcribed using the sigma factor σ70, which recognizes as a consensus “TTGACA” at +35 and “TATAAT” at -10. Which strand is the template, and in which direction is it read?
Top strand, read to the right.
Bottom strand, read to the right.
Top strand, read to the left.
Bottom strand, read to the left.
Either strand could be the template, read to the right.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
DNA polymerase CANNOT do which of the following?
Synthesize Okazaki fragments.
Move on the leading strand in the same direction as helicase.
Move 3’ to 5’ on the template strand for more than one base.
Synthesize the lagging strand continuously.
Hydrolyze a phosphodiester bond.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a part of the updated (modern) “Central Dogma” of Biology?
DNA makes RNA
DNA makes DNA
RNA makes DNA
RNA makes protein
Protein makes RNA
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