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DNA Structure and Replication

DNA Structure and Replication
The nicks or gaps between Okazaki fragments are eventually sealed by

gyrase
polymerase
RNA ligase
DNA ligase

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DNA Structure and Replication
The chromosomal DNA complexes with

five types of histone as H1, H2A, H2B, H3 and H4
three types of histone as H1, H2A and H4
four types of histone as H1, H2A, H3 and H4
two types of histone as H1 and H4

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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

protamines
All of these
pyrimidines
purines

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DNA Structure and Replication
What is the only common methylation in the DNA of eukaryotes?

Cytosine in CpG dinucleotides
None of these
Guanosine in ApGpA trinucleotides
Adenosine in GpA dinucleotides

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DNA Structure and Replication
Which of the following in DNA replication and transcription are common?

incorporation of deoxynucleotides
None of these
utilization the same enzyme
synthesis in the 5'-3' direction

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DNA Structure and Replication
What bands will be observed in a cesium chloride gradient after two rounds of replication?

One light, one medium and one heavy band
One light and one medium band
One medium and one heavy band
One medium band

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