Question

Which base is found only in DNA?

adenine
guanine
cytosine
thymine
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Answer 1

Thymine

Step-by-step explanation:

Thymine is the base that is found only in DNA. Adenine, guanine, and cytosine are bases found both in DNA and RNA. Thymine specifically pairs with adenine in DNA through hydrogen bonding, forming one of the complementary base pairs that stabilize the double helix structure of DNA. In RNA, thymine is replaced by uracil, which pairs with adenine instead.