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Answer on Molecular Biology Question for qwerty

Question #41239
Assertion :- Topoisomerase enzyme prevents supercoiling of DNA.
Reason :- Topoisomerase enzyme act on hydrogen bond.
(1) A (2) B (3) C (4) D
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11.04.2014 12:59

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11.04.2014 11:02

Thanks Experts...

Assignment Expert
11.04.2014 08:04

Eukaryotic DNA topoisomerases are an enzymes that act to relax supercoils generated during transcription and DNA replication. Because of the size of the eukaryotic chromosome, removal of these supercoils can only be accomplished locally by introducing breaks into the DNA helix. Topo I mediates DNA relaxation by creating a transient single-strand break in the DNA duplex. Type II topoisomerases cut both strands of the DNA helix simultaneously. These transient nicks allows the broken strand to rotate around its intact complement, effectively removing local supercoils. Thus, the correct answer is C

09.04.2014 11:24

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.

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