AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are nitrogenous bases of the pyrimidine type?
A
Guanine and adenine
B
Cytosine and uracil
C
Thymine and guanine
D
Ribose and deoxyribose
Explanation: 

Detailed explanation-1: -Pyrimidine: A nitrogenous base similar to benzene (a six-membered ring) and includes cytosine, thymine, and uracil as bases used for DNA or RNA.

Detailed explanation-2: -Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)).

Detailed explanation-3: -Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA .

Detailed explanation-4: -The two types of nitrogenous bases present in the nucleotide are purine and Pyrimidine. Adenine and Guanine are purines and Cytosine, Uracil, and Thymine are pyrimidines.

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