1. Tardigrade
  2. Question
  3. Biology
  4. Identify the given structural formulae and select the correct option. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/a4692647299a93feec994ddefbf2f8c1-.jpeg /> A B (a) Adenine Uracil (b) Guanine Thymine (c) Adenine Guanine (d) Cytosine Thymine

Q. Identify the given structural formulae and select the correct option.
image
A B
(a) Adenine Uracil
(b) Guanine Thymine
(c) Adenine Guanine
(d) Cytosine Thymine

 1758  214 Biomolecules Report Error

Solution:

Nitrogen bases are heterocyclic compounds. They are of two types, substituted purines and substituted pyrimidines. Purines are larger-sized nitrogen containing biomolecules. They have 9-membered double rings. A purine has imidazole ring joined to pyrimidine ring at 4 and 5 positions. It has nitrogens at 1, 3, 7 and 9 positions. There are two types of purines — adenine (A) and guanine (G).Pyrimidines are 6-membered rings. A pyrimidine ring has nitrogen at 1 and 3 positions. Pyrimidine bases are of three types - cytosine (C), thymine (T) and uracil (U).