Action of topoisomerase III -: (A) Remove positive supercoil, (B) Remove negative supercoil, (C) Form negative supercoid, (D) Single strand break
Answer is D. Ans. is 4d' i.e., Single strand breako Topoisomerase I - Removes negative supercoiling.o Topoisomerase II - Relaxes positive supercoils and forms negative supercoiling by condensation, of chromosome,o Topoisomerase III - Can introduce single strand breaks during recombination that are required for DNA to be exchanged by adjacent chromosome.o Topoisomerase IV- Acts to disentangle the replicated intertwined DNA strands by making double-strand breaks that allow one duplex to pass through the other.