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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?

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

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DNA Structure and Replication
In a cesium chloride gradient, DNA labeled with 15N and centrifuged will form a band

all of these
below DNA containing 14N
above DNA containing 14N
with 14N-containing DNA

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

Single stranded protein, DNAa
DNAb, DNA polymerase
DNAa, gyrase
DNAb, gyrase

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DNA Structure and Replication
What does ligase do during replication of DNA?

Synthesizes the lagging strand
Joins nicks in DNA strands
Makes copies of mRNA from DNA
Digests mRNA when it is no longer needed

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DNA Structure and Replication
Number of times the two DNA strands are interwined in circular DNA and is known as

linking number
twisting number
none of these
helix frequency

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DNA Structure and Replication
Telomeres are usually rich in which nucleotide?

Adenine
Guanine
Thymine
Cytosine

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MORE MCQ ON DNA Structure and Replication

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