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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purines have 1 ring
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purines have 2 rings
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pyrimidines have 2 rings
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pymimidines have 1 ring
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Detailed explanation-1: -The pyrimidines (cytosine, uracil, and thymine) only have one single ring, which has just six members and two nitrogen atoms.
Detailed explanation-2: -There are four types of nitrogenous bases in DNA. Adenine (A) and guanine (G) are double-ringed purines, and cytosine (C) and thymine (T) are smaller, single-ringed pyrimidines. The nucleotide is named according to the nitrogenous base it contains.
Detailed explanation-3: -Explanation: Pyrimidines are nitrogenous bases with 1 ring structure, whereas purines are nitrogenous bases with 2 ring structures. Cytosine and thymine are pyrimidines since they both have one ring structure, whereas adenine and guanine are purines with two connected ring structures.
Detailed explanation-4: -Pyrimidine bases (single ring structures) are thymine, cytosine and uracil.
Detailed explanation-5: -Purines have a double ringed aromatic structure. Adenine and guanine are examples of purines. Pyrimidines have a single ringed structure. Cytosine, thymine and uracil are examples of pyrimidine.