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DNA Structure and Replication

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

Dehydration
Depurination
Single strand break
Formation of thymine dimers

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DNA Structure and Replication
Enzyme, responsible for proofreading base pairing is

Primase
DNA ligase
Telomerase
DNA polymerase

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DNA Structure and Replication
Which of the following in DNA replication and transcription are common?

utilization the same enzyme
incorporation of deoxynucleotides
None of these
synthesis in the 5'-3' direction

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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
DNAs when charged, migrate in a gel towards the

none of these
will not migrate
positive pole
negative pole

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DNA Structure and Replication
The melting of 40-45 bp at the oriC site of E. coli requires

DNA + ATP + HU + DNAb
DNA + ATP + HU + DNAb + DNAa + Pol III holoenzyme
DNA+ ATP + HU + DNAb + DNAa
DNA + ATP + HU

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