Answer:
108 molecules of cytosine are present in this molecules of DNA.
Explanation:
Each base pair consists of two bases.
180 base pairs = 180*2= 360 bases
20% adenines means= 20 * 360/100= 72 adenine molecules
A=T
72 Adenines = 72 Thymines
360-144 = 216
216 = G + C
G = 108
C= 108
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