Exercise: Dna Structure And Replication

Questions for: Dna Structure And Replication

Which of the following is used to determine the appropriate stringency (Wallace rule)?
A:
Tm = 2 x (No.of G:C base pair) + 4 x (No.of A:T base pair)
B:
Tm = 4 x (No.of A:T base pair) + 2 x (No.of G:C base pair)
C:
Tm = 4 x (No.of G:C base pair) + 2 x (No.of A:T base pair)
D:
Tm = 69.3° + 0.41 (%)G+C -650/1
Answer: C
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30 nm wide helix with five or six nucleosomes per helix is known as
A:
solenoid
B:
halonoid
C:
kinoplast
D:
none of these
Answer: A
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In a typical electrophoresis experiment, larger fragments of DNA move more
A:
slowly, so they appear nearer the top of a gel photograph
B:
quickly, so they appear nearer the top of a gel photograph
C:
slowly, so they appear nearer the bottom of a gel photograph
D:
quickly, so they appear nearer the bottom of a gel photograph
Answer: A
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The DNA polymerase in bacteria, responsible for DNA synthesis is
A:
Polymerase I
B:
Polymerase II
C:
Polymerase III
D:
all of these
Answer: C
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Nucleosome is
A:
an octamer of four histones with H1 protein
B:
an hexamer of three histones with H1 protein
C:
an hexamer of three histones without H1 protein
D:
an octamer of four histones without H1 protein
Answer: D
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