Question

The number of nitrogen bases present in each pitch of DNA double helix is
(A) 10
(B) 20
(C) 5
(D) 2​

Answer 1

Answer:20

Explanation:

20

Answer 2

Answer:

The correct answer is option A  10 base pair .

Explanation:

• There are $10$ nitrogen base pair present on each pitch of double helix DNA .
• There are four types of base pair present in the DNA
  Adenine , Guanine , Cytosine , Thymine or Uracil
• The diameter of DNA is $2$nm .
• Nitrogen Base pair separated by $0 .34$ nm
• The complete one turn is about $3.4$nm as their are 10 base pair per turn.
  
  Hence , there are 10 base pair present in each pitch of DNA .

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