OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cytosine always pairs with
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Adenine
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Thymine
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Uracil
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Guanine
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Explanation:
Detailed explanation-1: -Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G) [GWA-NeeN] or thymine (T). The two strands are held together by hydrogen bonds between pairs of bases: adenine pairs with thymine, and cytosine pairs with guanine.
Detailed explanation-2: -This is known as a complementary base pairing. The purines form hydrogen bonds with pyrimidines, in which adenine bonds only to thymine in two hydrogen bonds, and cytosine bonds only to the guanine in three hydrogen bonds.
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