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DNA Structure and Replication

DNA Structure and Replication
What is the exact name of the classical Watson-Crick double helix DNA?

Z-DNA
A-DNA
X-DNA
B-DNA

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DNA Structure and Replication
Each replication bubbles consists of

2 replication forks
1 replication forks
3 replication forks
4 replication forks

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

none of these
helicase
DNA polymerase
strandase

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DNA Structure and Replication
Messelsen and Stahl model of replication was called

conservative replication
semi-conservative replication
Cri du Chat
dispersive replication

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

Depurination
Formation of thymine dimers
Single strand break
Dehydration

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