Question

What is the shape of DNA?

Answer 1

DNA :

1. The genetic constituent of a living organism is called DNA.
2. It is the polymer of deoxynucleotides

The shape of DNA:

1. The shape of DNA was first discovered by James Watson, Francis Crick, and Rosalind Franklin.
2. The shape of deoxyribonucleic acid is a double helix.
3. The structure is composed of two polynucleotide chains where the paired bases project inside and the backbone of the helix is formed by sugar-phosphate molecules.
4. It consists of two strands that are twisted around the common axis to form a double helix shape that runs in antiparallel directions.
5. The two antiparallel chains have the polarity of 5'-3' and 3'-5'.
6. The bases in two strands are paired by the formation of hydrogen bonds between two nitrogenous bases ( Adenine forms a double hydrogen bond with Thymine and Cytosine forms a triple hydrogen bond with Guanine Cytosine).