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DNA Structure and Replication

DNA Structure and Replication
An RNA primer is synthesized by

DNA helicases
primase
DNA topoisomerase
ligase

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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
The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by

None of these
shortening of the double stranded replicated portion
using enzyme called telomerase
using RNA as a template

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DNA Structure and Replication
Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?

3' → 5' exonuclease
All of these
5' → 3' polymerase
5' → 3' exonuclease

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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

DNA polymerase
strandase
none of these
helicase

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DNA Structure and Replication
Each replication bubbles consists of

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

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