Question

What are nucleotides and what are their importance in biology?

Answer 1

Nucleotides are building blocks of nucleic acids which are important for the existence of life.

Explanation:

A cell which is a basic unit of life, if doesn't possess nucleotides then it can no more remain a cell.
The nucleotides present in `"DNA"` are deoxyribonucleotides while in `"RNA"` these are ribonucleotides.

The nucleotides are present in cell's genetic material i.e `"DNA` & also in `"RNA"` which act as a sort of messenger that conveys message of `"DNA` to ribosomes. `"DNA` has portions containing sepcific sequence of these nucleotides. These sections are called genes. This specific sequence of nucleotides on each gene is transcribed into `mRNA`"(made up of nucleotides) and translated in order to form proteins. These proteins are vital for proper body functioning.

Besides, some nucleotides also serve as co-enzymes and thus help to speed up several biochemical reaction taking place in our bodies.
Most common examples are flavin dinucleotide`(FAD)` and Nicotine dinucleotide`(NAD)`.

So, we can say: No nucleotides `to` No life.

The link below contains quite interesting & detailed info. Give a read to this:
http://www.prosol-spa.it/blog/-/blogs/the-importance-of-nucleotides-in-physiological-processes

Hope it helps!