THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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C-A, T-G
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C-G, U-A
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A-G, C-T
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T-A, G-C
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Detailed explanation-1: -C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)
Detailed explanation-2: -Answer and Explanation: The nitrogenous bases present in DNA are adenine represented by A, thymine represented by T, guanine represented by G, and cytosine represented by C. The complementary base pairs that are present in DNA are A-T and G-C.
Detailed explanation-3: -The answer is that A-T and G-C pairs maximize the number of hydrogen bonds across the shared helical axis. A’s hydrogen donors can pair up with T’s hydrogen bond acceptors, and G’s hydrogen bond acceptors can pair up with C’s hydrogen bond donors. A-T and G-C are called complementary base pairs .
Detailed explanation-4: -Quantitatively, each GC base pair is held together by three hydrogen bonds, while AT and AU base pairs are held together by two hydrogen bonds. To emphasize this difference, the base pairings are often represented as “G≡C” versus “A=T” or “A=U".