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DNA Structure and Replication

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

dispersive replication
conservative replication
semi-conservative replication
Cri du Chat

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DNA Structure and Replication
30 nm wide helix with five or six nucleosomes per helix is known as

solenoid
none of these
halonoid
kinoplast

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
Klenow fragment without free nucleotides exhibits

exonuclease activity
endonuclease activity
nickase activity
no activity

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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

none of these
strandase
helicase
DNA polymerase

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

Thymine
Cytosine
Adenine
Guanine

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