DNA Structure and Replication
DNA helicase is used to

None of these
break a phosphodiester bond in DNA strand
interact the double helix closely
unwind the double helix

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DNA Structure and Replication
Which of the following is used to determine the appropriate stringency (Wallace rule)?

Tm = 69.3° + 0.41 (%)G+C -650/1
Tm = 4 x (No.of A:T base pair) + 2 x (No.of G:C base pair)
Tm = 4 x (No.of G:C base pair) + 2 x (No.of A:T base pair)
Tm = 2 x (No.of G:C base pair) + 4 x (No.of A:T base pair)

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