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WorksheetsWeek 3
Total questions: 7
Worksheet time: 4mins
Name
Class
Date
1.
DNA polymerase has
a)
5’→3’ DNA synthesis and 5’→3’ exonuclease activity
b)
5’→3’ DNA synthesis and 3’→5’ exonuclease activity
c)
3’→5’ DNA synthesis and 5’→3’ exonuclease activity
d)
3’→5’ DNA synthesis and 3’→5’ exonuclease activity
2.
What is the correct order of proteins involved in DNA replication?
a)
SSB proteins, helicase, DNA polymerase, DNA primase, ligase
b)
DNA primase, helicase, DNA polymerase, SSB proteins, ligase
c)
DNA polymerase, helicase, DNA primase, SSB proteins, ligase
d)
Helicase, SSB proteins, DNA primase, DNA polymerase, ligase
3.
What is false about DNA replication?
a)
Clamp assembly occurs at the 3' end of the growing chain
b)
The lagging strand is made in the 3’ to 5’ direction
c)
Discontinuous lagging strand fragments are Okazaki fragments
d)
DNA replication occurs bi-directionally
4.
What is the role of MutS?
a)
Scans nearby DNA for a nick
b)
Triggers degradation of nicked strand
c)
Binds specifically to a mismatched base pair
d)
Methylates mismatched base pairs
5.
What is the role of telomerase?
a)
To extend the lagging strand in a 5’ to 3’ direction
b)
To extend the lagging strand in a 3’ to 5’ direction
c)
To extend the parental strand in a 3’ to 5’ direction
d)
To extend the parental strand in a 5’ to 3’ direction
6.
Which of the following correctly orders the levels of eukaryotic DNA packaging from smallest to largest?
a)
DNA<Chromatin<Chromosome<Nucleosome
b)
DNA<Chromatin<Nucleosome<Chromosome
c)
Nucleosome<DNA<Chromatin<Chromosome
d)
DNA<Nucleosome<Chromatin<Chromosome
7.
Which of the following is true in DNA replication?
a)
DNA polymerase adds nucleotides to the 5’ end of growing strand
b)
Nucleotides are added by complementary base pairing with coding strand
c)
deoxynucleotide diphosphates are hydrolyzed to provide energy
d)
None of the above
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