Multiple choice

Why is the value of Tm (melting temperature) more for some DNAs as compared with other DNAs?

  1. DNA which contains more adenine (A) and thymine (T) content will have more Tm value compared with other DNAs.

  2. Tm value increases with the cytosine and guanine content in the DNA.

  3. Greater the number of C-G pairs in the DNA, more will be its Tm value than the others which have more A-T pairs.

  4. Options (2) & (3) are correct

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, both the options (2) and (3) actually describe the increased Tm value for some DNAs compared with others.Hence, this option is the correct answer.

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