Question

Draw only labelled diagram of a DNA double helix structure.

Hint:

In the DNA double helix, base pairing ensures that the genetic information is stored accurately. A pairs with T, and C pairs with G.

Answer 1

A labelled diagram of the DNA double helix structure is as follows: 

Key Features of the DNA Double Helix Structure:
1. **Double Strands**: DNA consists of two long chains of nucleotides coiled around each other, forming a double helix structure. 
2. **Sugar-Phosphate Backbone**: The backbone of each strand is made up of alternating sugar (deoxyribose) and phosphate groups. 
3. **Nitrogenous Bases**: Each strand contains nitrogenous bases (Adenine, Thymine, Cytosine, Guanine) that pair specifically: 
- Adenine (A) pairs with Thymine (T) via two hydrogen bonds. 
- Cytosine (C) pairs with Guanine (G) via three hydrogen bonds. 
4. **Complementary Base Pairing**: The two strands of DNA are complementary, meaning the sequence of bases on one strand dictates the sequence on the other strand.