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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adenine & guanine
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adenine & thymine
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thymine & cytosine
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thymine & guanine
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Detailed explanation-1: -Purine bases include adenine (6-aminopurine) and guanine (2-amino-6-oxypurine) (Fig. 6.3).
Detailed explanation-2: -There are two main types of purine: Adenine and Guanine. Both of these occur in both DNA and RNA.
Detailed explanation-3: -Purines and Pyrimidines are nitrogenous bases that make up the two different kinds of nucleotide bases in DNA and RNA. The two-carbon nitrogen ring bases (adenine and guanine) are purines, while the one-carbon nitrogen ring bases (thymine and cytosine) are pyrimidines.
Detailed explanation-4: -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-5: -Adenine (A) and guanine (G) are purines, and cytosine (C), thymine (T), and uracil (U) are pyrimidines.