Question

JUL
29.
The Tm of a DNA molecule, when measured in 0.15 M NaCl was 60°C. What will be its Tm, compared to 60°C,
if measured in the presence of 0.15 M NaCl and 0.5 M Urea?
a. lower
b. higher
c. no change
d. zero
​

Answer 1

Answer:

Answer is (A). It has Urea which favours denaturation. So it will denature the DNA molecule & thus it's Tm will become lower.