BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The pyrimidine bases are thymine (5-methyl-2, 4-dioxipyrimidine), cytosine (2-oxo-4-aminopyrimidine), and uracil (2, 4-dioxoypyrimidine) (Fig. 6.2). Figure 6.2.

Detailed explanation-2: -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-3: -Nitrogenous bases Adenine and guanine are purines, meaning that their structures contain two fused carbon-nitrogen rings. Cytosine and thymine, in contrast, are pyrimidines and have a single carbon-nitrogen ring.

Detailed explanation-4: -Three types of nucleobases are pyrimidine derivatives: cytosine(C), thymine(T), and uracil(U).

Detailed explanation-5: -There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).