Which of the following is correct pair of pyrimidine bases?
Adenine & Thymine
Adenine & Guanine
Thymine & Cytosine
Guanine & Cytosine
A
Adenine & Thymine
B
Guanine & Cytosine
C
Adenine & Guanine
D
Thymine & Cytosine
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Solution
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DNA molecule id made up of two type of nitrogen bases purine and pyrimidine. Cytosine and Thymine (C, T) are examples of a pyrimidine which is composed of a single six atom ring and adenine and guanine (A,G) are the examples of purine. A base pair is one of the pairs A-T or C-G. The A-T pair forms two hydrogen bonds. The C-G pair is formed by three hydrogen bonding between complementary bases holds the two strands of DNA together
So, the correct answer is 'Thymine and Cytosine'.
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Which of the following is/are pyrimidine derivatives? 1.Cytosine 2. Adenine 3. Uracil 4. Thymine
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