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  • Select the incorrect pair from the following:Option: 1 B-DNA - right handed with 10 base pairs

Select the incorrect pair from the following:

Option: 1

B-DNA - right handed with 10 base pairs


Option: 2

A-DNA - 92% relative humidity and low ionic strength


Option: 3

Z- DNA - diameter of the helix is 18Å0 


Option: 4

A-DNA - comprises 11 base pairs


Answers (1)

best_answer
  • A-DNA is formed under 75% relative humidity and in the presence of sodium, potassium and cesium ions and not in the presence of  92% relative humidity and low ionic strength.
  • B-DNA is actually formed in the presence of  92% relative humidity and low ionic strength. It exists as right-handed double-helical DNA.
  • One turn in A-form comprises 11 bases and in  B-DNA comprises 10 base pairs.
  • Hence, option 2 is the correct answer.

 

Posted by

Kuldeep Maurya

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