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DNA Structure and Replication

DNA Structure and Replication
If one cell has AT contents 40%, what will be the percentage of Guanine residue?

60%
30%
15%
Guanine residue can not be calculated

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DNA Structure and Replication
Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?

Erythromycin
Bleomycin
All of these
Tunicamycin

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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

helicase
none of these
DNA polymerase
strandase

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

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DNA Structure and Replication
In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as

discontinuous
antiparallel
mutational
semiconservative

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DNA Structure and Replication
DNA replication results in

one new molecule of RNA
one new DNA molecules 1 old molecule
two completely new DNA molecules
two DNA molecules such that each one contains a strand of the original

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