DNA basics

Deoxyribonucleicacid. it is present in the nucleus of the the cell. it is responsible for ur genetic make up and hereditary mental characteristics. during the process of reproduction the child inherits 50 % of his genetic make up from each of the parents.

a lot of smart people have answered it correctly.
To add,

DNA structure was explained by Watson & Crick using X ray diffraction model.
this model explains the Semi- conservative model of DNA very well.

DNA is like a rope staircase which is helically coiled.
The sides of this staircase are made up of sugars and phosphates and the rungs are made up of a pair of nitrogenous bases, the pair is joined by weak hydrogen bonds.
The N bases - Adenine which always pairs with Thymine
Cytosine which always pairs with Guanine

After every 10 base pairs there is a tun of the helix.


S ..A ... T...S
P P
S.. C ....G..S
P P

the sugar in DNA is deoxyribose
consits of two parallel chains held together by the pairing of bases between adjacent chains
Four different bases found in nucleic acids-
adenine
thymine
guanine
cytosine

DNA stores inherited info so the types of proteins can be manufactured in a cell