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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
None of these
H
B

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DNA Structure and Replication
E.coli DNA polymerases II and III lack

partially 5' → 3' endonuclease activity
5' → 3' exonuclease activity
5' → 3' endonuclease activity
partially 5' → 3' exonuclease activity

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DNA Structure and Replication
In sperm heads, DNA is particularly highly condensed and the histones are replaced with small basic protein called

All of these
pyrimidines
purines
protamines

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DNA Structure and Replication
For the DNA replication in eukaryotes, the cell cycle consists of

G1,S, G2 and M phases
G1, G2 and M phases
S, G2 and M phases
G2 and M phases

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DNA Structure and Replication
What is the approximate percentage of repetitive DNA sequences in human DNA?

10 to 20%
30 to 40%
40 to 50%
20 to 30%

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DNA Structure and Replication
Okazaki fragments occur during

replication
transformation
polymerase reaction
synthesis

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