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DNA Structure and Replication

DNA Structure and Replication
What is the IUPAC code for an A, C, T ambiguity in a nucleic acid sequence?

S
H
B
None of these

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DNA Structure and Replication
Messelsen and Stahl model of replication was called

dispersive replication
conservative replication
semi-conservative replication
Cri du Chat

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DNA Structure and Replication
If one cell has AT contents 40%, what will be the percentage of Guanine residue?

60%
Guanine residue can not be calculated
15%
30%

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DNA Structure and Replication
In a cesium chloride gradient, DNA labeled with 15N and centrifuged will form a band

below DNA containing 14N
with 14N-containing DNA
above DNA containing 14N
all of these

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DNA Structure and Replication
Which enzyme catalyzes the elongation of DNA molecules?

Helicase
DNA ligase
DNA polymerase
Primase

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DNA Structure and Replication
Each replication bubbles consists of

4 replication forks
3 replication forks
1 replication forks
2 replication forks

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