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DNA Structure and Replication

DNA Structure and Replication
Replication in E. coli is initiated by the generation of short RNA primers using

primase
reverse transcriptase
RNA polymerase
both (a) and (b)

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

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

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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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DNA Structure and Replication
Which histone(s) are associated with the linker DNA of a nucleosome?

Histone H4
Histone H3
Histones H2A and H2B
Histone H1

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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
protamines
pyrimidines
purines

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DNA Structure and Replication
Proteins which help to open the double helix for DNA synthesis are

single stranded binding proteins
DNA topoisomerase
ligase
DNA helicases

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