Question : DNA molecule looks like a twisted ladder. – InterviewSolution

InterviewSolution

1.	Question : DNA molecule looks like a twisted ladder.
Answer» SOLUTION :(1) THEERE are two polynucleotide strands in the DNA molecule which are coiled helically around an imaginary, COMMON, central axis. Hence it shows a twisted appearance. (2) There are hydrogen bonds between purines and pyrimidines of the oposing DNA STRAND. There is double hydrogen bond between A and T or T and A and a triple hydrogen bond between C and G or G and C. (3) Since these bonds appear as the rungs of a ladder, the DNA molecule looks like a twisted ladder.

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