Identify two structural features of purines and pyrimidines.

Purines

contain two heterocyclic rings.

contain only two ring nitrogen atoms.

contain four ring nitrogen atoms.

contain one heterocyclic ring.

contain only three ring nitrogen atoms.

Pyrimidines

contain one heterocyclic ring.

contain four ring nitrogen atoms.

contain only three ring nitrogen atoms.

contain two heterocyclic rings.

contain only two ring nitrogen atoms.

Question

Frederick Owens

Biology

23 July, 06:59

Identify two structural features of purines and pyrimidines.

Purines

contain two heterocyclic rings.

contain only two ring nitrogen atoms.

contain four ring nitrogen atoms.

contain one heterocyclic ring.

contain only three ring nitrogen atoms.

Pyrimidines

contain one heterocyclic ring.

contain four ring nitrogen atoms.

contain only three ring nitrogen atoms.

contain two heterocyclic rings.

contain only two ring nitrogen atoms.

+4

Answers (1)

Know the Answer?

Steve Bates · Answer 1

Purines and pyrimidines are the nitrogenous bases of the nucleic acids and act as the building blocks of the DNA and RNA.

They both show structural differences between them as the-

Purines:

1. contain only four ring nitrogen atoms.

2. contain two heterocyclic rings.

Pyrimidines:

1. contain only two ring nitrogen atoms.

2. contain one heterocyclic ring