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DNA Structure and Replication

DNA Structure and Replication
The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is

strandase
DNA polymerase
none of these
helicase

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DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

none of these
kinoplast
halonoid
solenoid

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DNA Structure and Replication
After one replication in 15N, how many bands should be observed in a cesium chloride gradient?

Two
A smear
One
Three

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DNA Structure and Replication
The chromosomal DNA complexes with

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

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DNA Structure and Replication
TM refers to the temperature at which

membranes are 50% fluid
50% of a protein molecules are denatured
50% of a DNA molecule is denatured
All of these

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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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