Bio-Chemistry (M.Phil./Ph.D.) 2015 Panjab University Entrance Exam With Answers

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23.

DNA topoisomerase I of E coli catalyses

A: Relaxation of negatively supercoiled DNA
B: Relaxation of positively supercoiled DNA
C: Conversion of negatively supercoiled DNA into positively supercoiled DNA
D: Conversion of double helix into supercoiled DNA

The answer is: A

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