BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Nitrogen base not found in DNA is uracil. It is found only in RNA.

Detailed explanation-2: -Uracil is one of four nitrogenous bases found in the RNA molecule: uracil and cytosine (derived from pyrimidine) and adenine and guanine (derived from purine). Deoxyribonucleic acid (DNA) also contains each of these nitrogenous bases, except that thymine is substituted for uracil.

Detailed explanation-3: -The nitrogenous bases found in nucleotides are classified as pyrimidines or purines. Pyrimidines are heterocyclic amines with two nitrogen atoms in a six-member ring and include uracil, thymine, and cytosine.

Detailed explanation-4: -Explanation: Uracil is a nitrogenous base that is only found in single-stranded RNA-it is not found in DNA.

Detailed explanation-5: -Uracil is not found in DNA as it uracil has more base pair affinity to adenine, guanine and cytosine. Instead thymine is present in DNA.