What are the components of DNA? (A) Sugars, bases, proteins (B) Sugars, phosphates, bases (C) Phosphates, bases, polypeptides (D) Phosphates, proteins, polypeptides - HSC - SSCE Biology - Question 2 - 2006 - Paper 1

The components of DNA include three key elements: sugars, phosphates, and nitrogenous bases.

1. Sugars: The sugar in DNA is deoxyribose, which is a five-carbon sugar. Each sugar molecule forms a bond with a phosphate group and a nitrogenous base.

2. Phosphates: DNA has a phosphate group that connects the sugars of adjacent nucleotides, forming the backbone of the DNA strand. This phosphate-sugar backbone is crucial for the structural stability of DNA.

3. Nitrogenous Bases: The bases in DNA include adenine (A), thymine (T), cytosine (C), and guanine (G). These bases pair specifically (A with T and C with G) to form the rungs of the DNA ladder.

Based on these components, the correct answer is (B) Sugars, phosphates, bases.