✅ On February 28, 1953, James Watson and Francis Crick discovered the structure of DNA, the now-famous double helix.
✅ Their discovery helped unlock the mystery of our genetic code, and it helped us understand what makes us us.
✅ DNA was discovered by Friedrich Miescher in 1869.
✅ Watson and Crick Propose the Double Helix structure of DNA with the two strands connected by hydrogen bonds in 1953.
▪️ DNA
✅ DNA is a long molecule that contains our unique genetic code.
✅ It holds the instructions for making all the proteins in our bodies and function of living things.
✅ In the cell nucleus, the DNA (deoxyribonucleic acid) molecule is packaged into thread-like structures called chromosomes.
✅ A chromosome (microscopic structure) is made up of DNA tightly coiled many times around proteins called histones that support its structure.
✅ A chromosome has two arm - p arm (short arm) and q arm (long arm), joined in the location of the centromere.
✅ The information in DNA (double helix structure) is stored as a code made up of four chemical bases:
🔸adenine (A),
🔸guanine (G),
🔸cytosine (C), and
🔸thymine (T).
✅ DNA has two base pairs, A-T and G-C, attached to a sugar-phosphate backbone.
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