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Q.

Two samples of DNA, A and B have melting points 340K and 350 K respectively. This is Because

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a

A has more AT content than B

b

Both have same AT content

c

A has more GC content than B

d

B has more GC content than A

answer is A.

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Detailed Solution

The B sample of DNA having higher melting point must be having more GC content as compared to sample A. Since GC base pair having 3 hydrogen bonds as compared to AT base pair having only 2 hydrogen bonds, results in stronger bonding.

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Two samples of DNA, A and B have melting points 340K and 350 K respectively. This is Because