Question

In a linear double stranded DNA 6.2 kilo base pairs are present. If thymine is 2160 then give the number of guanine base.

Answer 1

hello friend...!!!

• total number of base pairs = 6.2 kilo

implies, 6.2 kilo = 6.2 X 1000 = 6200 base pairs

• 6200 base pairs = 6200x 2 = 12400 bases.

• the number of thymine present = 2160

• to find the number of guanine,

• we know, number of thymine = number of adenine. also number if guanine = number of cytosine. ( chargaff's rule)

• T = 2160 = A

implies, A + T = 2160 X 2 = 4320 .

Implies,

G + C = total number of bases - ( A + T)

G + C = 12400 - 4320

we know G = C

implies,

2G = 8080

Therefore,

G = 8080 / 2

G = 4040.

the number of guanine is equal to 4040.

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hope it helps...!!!