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DNA Structure and Replication

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
purines
pyrimidines

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Can not be compared
Increases
Remains same
Decreases

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DNA Structure and Replication
What is the approximate size (in kb) of the E. coli genome?

3000 kilobase
6500 kilobase
5500 kilobase
4500 kilobase

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

negative pole
will not migrate
positive pole
none of these

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DNA Structure and Replication
What is the main damaging effect of UV radiation on DNA?

Depurination
Formation of thymine dimers
Dehydration
Single strand break

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DNA Structure and Replication
What is the name given to the points at which a DNA helix is unwound and new strands develop?

Replication forks
Leading strands
Replication origins
Okazaki fragments

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