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 purine bases?
A
Adenine
B
Cytosine
C
Guanine
D
Thymine
E
Uracil
Explanation: 

Detailed explanation-1: -Guanine is a purine base. Adenine is another purine base. Cytosine, Thymine and Uracil are pyrimidines.

Detailed explanation-2: -Purines (adenine and guanine) are two-carbon nitrogen ring bases while pyrimidines (cytosine and thymine) are one-carbon nitrogen ring bases. Given below in a tabular column are the differences between Purines and Pyrimidines.

Detailed explanation-3: -Assertion :Purine bases present in DNA are adenine and guanine.

Detailed explanation-4: -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-5: -Adenine (A) and guanine (G) are purines, and cytosine (C), thymine (T), and urasil (U) are pyrimidines.

There is 1 question to complete.