Write the structures of fragments produced on complete hydrolysis of DNA. How are they linked in DNA molecule? Draw a diagram to show pairing of nucleotide bases in double helix of DNA.

Explanation

To answer the question regarding the structures of fragments produced on complete hydrolysis of DNA, how they are linked in the DNA molecule, and to draw a diagram showing the pairing of nucleotide bases in the double helix of DNA, we can break it down into clear steps.

### Step 1: Identify the Components of DNA
DNA is made up of three main components:
1. **Pentose Sugar**: In DNA, the sugar is deoxyribose.
2. **Phosphate Group**: The phosphate group is derived from phosphoric acid (H₃PO₄).
3. **Nitrogenous Bases**: There are four types of nitrogenous bases in DNA: adenine (A), thymine (T), guanine (G), and cytosine (C).

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