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Q.

There are two DNA molecules. One of them has 70% G-C content in their DNA and the other has 45% G-C content. Identify the correct statement w.r.t to the above information.

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a

The DNA with 45 % G-C content has higher melting point as compared to the DNA with 70% G-C content.

b

The DNA with 70 % G-C content has higher melting point as compared to the DNA with 45% G-C content.

c

Both the DNA will have same melting point

d

Melting point has no relation with the G-C content in a cell.

answer is B.

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Detailed Solution

Melting point depends on G-C content. More G-C content means higher the melting point. Therefore, the DNA with 70 % G-C content has higher melting point as compared to the DNA with 45% G-C content.

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