Question #44860

In DNA segment of six coils,22 bp are linked by two hydrogen bonds.How many cytosine bases would be present-

A)22 B)38 C)44 D)76

Please explain.

A)22 B)38 C)44 D)76

Please explain.

Expert's answer

B-DNA segment contains approximately 10 base pairs percoil, so 6 coils contain 60 base pairs. Adenine and thymine bases form 2

hydrogen bonds. Thus, total number of cytosine and guanine base pairs is 60 - 22 = 38. As the number of cytosine bases is equal to the number of guanine bases, both equal to 38 bases

hydrogen bonds. Thus, total number of cytosine and guanine base pairs is 60 - 22 = 38. As the number of cytosine bases is equal to the number of guanine bases, both equal to 38 bases

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