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DNA Structure and Replication

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

Guanine
Thymine
Adenine
Cytosine

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DNA Structure and Replication
DNA gyrase in E. coli

is required only at the oriC site
performs the same function as helicase in eukaryotes
adds positive supercoils to chromosomal DNA
can be inhibited with antibiotics

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

conservative replication
Cri du Chat
semi-conservative replication
dispersive replication

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DNA Structure and Replication
How does ethidium bromide interact with DNA?

It does not interact
It binds to phosphate
It intercalates between bases
It binds to adenine

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DNA Structure and Replication
The nucleosome consists of histone

tetramer and 146 bp of DNA
hexamer and 146 bp of DNA
None of these
octamer and 146 bp of DNA

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DNA Structure and Replication
In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?

Increases
Can not be compared
Decreases
Remains same

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