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In a double helix of DNA molecule of 10 coils, if there are 30 adenine nitrogen bases, what is the number of guanine nitrogen bases? |
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a) |
30 |
b) |
60 |
c) |
70 |
d) |
80 |
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In a double helix of DNA molecule of 10 coils, if there are 30 adenine nitrogen bases, what is the number of guanine nitrogen bases? |
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|
a) |
30 |
b) |
60 |
c) |
70 |
d) |
80 |
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(c) Total number of coils in a DNA molecule=10. We know that total number of nitrogen bases are present in a coil=20 (or 10 pairs). Thus, total number of nitrogenous base is 200. Out of these, 30 are adenine thus, according to Chargaff’s rule guanine should be 70 in number. |