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If an isolated strain of DNA is kept at ...

If an isolated strain of DNA is kept at 82- `90^(@)` C , then

A

It changes into RNA

B

It divides into one million pieces

C

No effect

D

It uncoils into helixes

Text Solution

Verified by Experts

The correct Answer is:
D
Native DNA are highly viscous at pH 7.0 and room temperature (`20-25^(@)C`) when such a solution is subjected to extremes of pH or to temperature above 80 – `90^(@)`C its viscosity decreases sharply indicating that DNA has undergone a physical change that cause denaturation or melting of duplex DNA.
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