THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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C and T
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A and T
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C and G
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A and G
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Detailed explanation-1: -Cytosine and thymine are the two major pyrimidine bases in DNA and base pair (see Watson–Crick Pairing) with guanine and adenine (see Purine Bases), respectively.
Detailed explanation-2: -Adenine (A) and guanine (G) are purines, and cytosine (C), thymine (T), and uracil (U) are pyrimidines. These are the most important parts in the nucleic acid, and genetic information is stored in the sequence of these molecules.
Detailed explanation-3: -The purines in DNA are adenine and guanine, the same as in RNA. The pyrimidines in DNA are cytosine and thymine; in RNA, they are cytosine and uracil.
Detailed explanation-4: -The pyrimidine bases are thymine (5-methyl-2, 4-dioxipyrimidine), cytosine (2-oxo-4-aminopyrimidine), and uracil (2, 4-dioxoypyrimidine) (Fig.
Detailed explanation-5: -In DNA, there are four nitrogenous base options: adenine (A), thymine (T), cytosine (C) and guanine (G). Each base can only bond with one other, A with T and C with G. This is called the complementary base pairing rule or Chargaff’s rule.