Exercise: Dna Structure And Replication

Questions for: Dna Structure And Replication

The size of a linear DNA fragment in a gel can be estimated by
A:
fluorescence in UV light
B:
the sedimentation coefficient
C:
the time it takes the gel to run
D:
comparison with a molecular weight standard such as Hind III digested phage lambda
Answer: D
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Which of the following species lack a 'classical' histone H1?
A:
Saccharomyces cerevisiae
B:
Strongylocentrotus purpuratus
C:
Xenopus laevis
D:
Arabidopsis thaliana
Answer: A
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The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is
A:
DNA polymerase
B:
strandase
C:
helicase
D:
none of these
Answer: C
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Number of times the two DNA strands are interwined in circular DNA and is known as
A:
helix frequency
B:
linking number
C:
twisting number
D:
none of these
Answer: B
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How does ethidium bromide interact with DNA?
A:
It binds to adenine
B:
It binds to phosphate
C:
It intercalates between bases
D:
It does not interact
Answer: C
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