“What Is DNA? Structure, Components & Function Made Simple” Introduction DNA is the chemical code that tells cells what to do — like a biological instruction manual. 🔬 Key Facts About DNA: Full Form: Deoxyribonucleic Acid Location: Found in the nucleus of most cells (also in mitochondria) Structure: Double helix (like a twisted ladder) Made of: Sugar-phosphate backbone Nitrogenous bases: Adenine (A), Thymine (T), Cytosine (C), Guanine (G) Base pairing: A–T and C–G Function: Stores genetic information and passes it from one generation to the next. 🧬 Discovery of DNA Structure : 🧠 Discovered in 1953 by James Watson and Francis Crick 📷 They used X-ray images taken by Rosalind Franklin 🔬 Found that DNA has a double helix shape (like a twisted ladder) 🧱 The structure explained how genetic information is stored and copied 🌍 It became one of the most important discoveries in biology and genetics 🧬 Double Helix Model – Key ...