Question

Who Created DNA?

Answer 1

DNA

1. DNA was first discovered by Friedrich Miescher, a Swiss chemist in 1869.
2. He was able to identify DNA as a distinct molecule after isolating it from human white blood cells.
3. At the time, he named his discovery as “nuclein”, which was later changed to “nucleic acid” and eventually “deoxyribonucleic acid”.
4. DNA (deoxy ribonucleic acid) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.
5. Most DNA molecules consist of two biopolymer strands strands coiled around each other to form a double helix.
6. The two DNA strands are called polynucleotides since since they are composed of simpler monomer units called nucleotides.
7. Each nucleotide is composed of one of four nitrogen containing nucleobases (cytosine [C], guanine [G], adenine [A] or thymine [T]), a sugar called deoxyribose, and a phosphate group.
8. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar phosphate backbone.
9. The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with help of hydrogen bond to make double-stranded DNA.