FOOD CHEMISTRY
CARBOHYDRATES PROTEINS AND LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A-T, G-C
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A-U, G-C
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G-T, C-A
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A-G, C-G
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Detailed explanation-1: -The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G)
Detailed explanation-2: -Erwin Chargaff found that in DNA, the ratios of adenine (A) to thymine (T) and guanine (G) to cytosine (C) are equal. This parity is obvious in the final DNA structure.
Detailed explanation-3: -Chargaff’s rules state that in the DNA of any species and any organism, the amount of guanine should be equal to the amount of cytosine and the amount of adenine should be equal to the amount of thymine. Further a 1:1 stoichiometric ratio of purine and pyrimidine bases (i.e., A+G=T+C ) should exist.
Detailed explanation-4: -The DNA base-pairing rules are strict in the sense that no nucleotide pairs with any other nucleotide except for its designated partner. The designated partners form complementary base pairs with each other as follows: In DNA, adenine (A) pairs with thymine on the other strand.