Question

Adenine, guanine, cytosine, and thymine are the four nitrogenous bases present in the DNA of all organisms. Which scientist discovered these bases?

Answer 1

ANSWER:

DISCOVERER OF NITROGENOUS BASES

The scientist who discovered the four nitrogenous bases adenine, guanine, cytosine and thymine present in the DNA of all organism is Phoebus Levene.

Adenine and guanine are called 'purines .

Cytosine and thymine are called 'pyrimidines'.

As there are four types of nitrogenous base nucleotides also are of four types.

Based on these four nitrogenous bases Nucleotides are arranged like a chain in a molecule of DNA. The two threads of DNA molecule are comparable to the two rails of a ladder and each rail is made up of alternately joined molecules of sugar and phosphoric acid. Each rung of the ladder is a pair of nitrogenous bases joined by hydrogen bonds. Adenine always pairs with thymine. Cytosine always pair with guanine.