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DNA Structure and Replication

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

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

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DNA Structure and Replication
There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?

none of these
Thousands and tens of thousands
One
About 100

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

Histone H3
Histone H4
Histone H1
Histones H2A and H2B

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DNA Structure and Replication
DNAs when charged, migrate in a gel towards the

positive pole
negative pole
none of these
will not migrate

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DNA Structure and Replication
What does ligase do during replication of DNA?

Joins nicks in DNA strands
Digests mRNA when it is no longer needed
Makes copies of mRNA from DNA
Synthesizes the lagging strand

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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
purines
pyrimidines

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