THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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uracil and thymine
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thymine and cytosine
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adenine and thymine
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cytosine and uracil
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Detailed explanation-1: -DNA has four types of nitrogenous bases : Adenine, Guanine, Thymine, and Cytosine. Adenine and guanine are purines while thymine and cytosine are pyrimidines.
Detailed explanation-2: -So, option A “ Cytosine and Thymine” is the correct answer.
Detailed explanation-3: -Three types of nucleobases are pyrimidine derivatives: cytosine(C), thymine(T), and uracil(U).
Detailed explanation-4: -One of two chemical compounds that cells use to make the building blocks of DNA and RNA. Examples of pyrimidines are cytosine, thymine, and uracil. Cytosine and thymine are used to make DNA and cytosine and uracil are used to make RNA.
Detailed explanation-5: -Pyrimidine is one of two classes of heterocyclic nitrogenous bases found in the nucleic acids DNA and RNA: in DNA the pyrimidines are cytosine and thymine, in RNA uracil replaces thymine. Pyrimidine is the parent compound of the pyrimidines; a diazine having the two nitrogens at the 1-and 3-positions.