Biology, asked by tb15722963, 11 months ago

In double-stranded DNA, 13% of the strand is found to be adenine. How much would you expect cytosine to be present?
74%

37%

26%

13%

Answers

Answered by mindfulmaisel
1

In a double stranded DNA 13% of the strength is found to be adenine hence 37% of the strand is expected to be cytosine.

Option: (b)

Explanation:

  • In a double stranded DNA there are usually four nitrogenous bases are present.
  • They are adenine guanine thymine and cytosine. Adenine and guanine are nitrogenous purine and cytosine and nitrogenous pyrimidine bases.
  • In a DNA double strand adenine binds with thymine and cytosine binds with guanine.
  • As a result the amount of adenine is equal to the amount of thiamine.
  • Similarly the amount of guanine is equal to the amount of cytosine.
  • Hence is the amount of adenine is equal to 13% the amount of of thymine is also equal to 13% similarly the amount of guanine and cytosine are both equal to 37%.

To know more about nitrogenous bases in DNA,

Name the four nitrogenous bases in DNA molecule. Brainly.in

https://brainly.in/question/14420126

Answered by babundrachoubay123
1

The amount of cytosine will be 37%

Explanation:

According to Chargaff's rule ,

In case of double stranded DNA,the amount of adenine is equal to the amount of thymine and the amount of cytosine is equal to the amount of guanine.

A=T and G≡C

If, the amount of adenine is 13% then the amount of Thymine is also 13%

then the amount of total guanine and cytosine is=100-(13+13)

                                                                                  =100-26

                                                                                   =74

   Then, the amount of cytosine will be=\frac{74}{2}

                                                                =37%

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