BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Adenine only ever binds to thymine
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Any purine can bind with any pyrimidine
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Cytosine only binds to guanine
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Adenine can only bind with thymine or uracil
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Complementary bases pair through hydrogen bonding
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Detailed explanation-1: -Answer and Explanation: The correct statement is a because DNA complementary base pairing occurs when C binds to G and A binds to T. Statement b is incorrect because adenine base pairs with thymine, not guanine, and cytosine base pairs with guanine, not thymine.
Detailed explanation-2: -Within a molecule of DNA, pairs of bases are chemically bonded together by hydrogen bonds. These bonds hold the two strands of the molecule together. Bases pair up with each other in a consistent way, and this process is called complementary base pairing, or Watson-Crick base pairing.
Detailed explanation-3: -A DNA adenine to an RNA thymine complementary base pairing does not exist because it is RNA, The base thymine is not present: Instead of thymine uracil is present which consists of a very similar structure like thymine.
Detailed explanation-4: -Answer and Explanation: The correct answer: The given option which is not correctly matched with its complementary base pair for either DNA or RNA is (d) Uracil-Cytosine.