In a molecule of double-stranded DNA, the amount of Cytosine present is always equal to the amount of ______.
a
Guanine
b
Thymine
c
Cytosine
d
Uracil
a
Guanine
In a molecule of double-stranded DNA, the amount of Cytosine is always equal to the amount of Guanine. This is due to the base pairing rules, where Cytosine (C) pairs with Guanine (G) through three hydrogen bonds. Similarly, Adenine (A) pairs with Thymine (T) in DNA through two hydrogen bonds. Uracil (U) is not found in DNA; it replaces Thymine in RNA.