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DNA Structure and Replication

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

dispersive replication
semi-conservative replication
Cri du Chat
conservative replication

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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%?

Decreases
Increases
Remains same
Can not be compared

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DNA Structure and Replication
DNA gyrase in E. coli

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

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DNA Structure and Replication
First evident that DNA is genetic material comes from the experiment of Griffith is

transduction
transformation
translation
replication

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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
Each replication bubbles consists of

3 replication forks
2 replication forks
4 replication forks
1 replication forks

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