Molecules and their Interaction Relevant to Biology

Molecules are is smallest particle of any compound that has chemical properties of the compound.

 So in simple language a compound is multiplication of a molecule.

 Molecules are not smallest structure in world. They made of atoms

 so atom is a smallest structure. 

The molecules has interaction reverent to biology.

 Very much molecules like carbohydrate, proteins, lipids, DNA or RNA are includes in biological study so we have to know that what is interaction between them.
 A.Structure of atoms:-

Atom is a smallest particle which has similar chemical properties to the compound. The atoms are combined by bonds and make molecules.  The atom is a smallest part which is not dividable. There is three particles in a atom.

1. Electron

2. Proton

3. Neutron

In the structure of a atom in the middle there is a nucleolus. And the electrons are moves circular to the nucleolus. The proton and neutron are found in nucleolus.
Know about nucleic acid-
NUCLEIC ACID

1. Electron=electrons are explore by j.j Thomson in 19^th century electrons have negative charge. In a atom moving in atomic orbital’s. There is a force between electron and the proton which attached them.

2. Proton=the proton is particles which has positive charge. The total number of proton called atomic number. In an atom number of electron and proton is same. Proton is presents in nucleolus. Firstly it seen by Rutherford in 1919.

3. Neutron= neutron are also present in nucleolus. Neutron has no electric charge but a mass of this is highest of all. It is discovered by  jams Chadwick in 1932. The weight of neutron + proton called atomic mass.

in  this topic some impotent points to be noted are:-

1.atom is smallest part of atom

2.proton number=atomic number

3.proton+neutron mass = atomic mass which symbol is Z

4.atom is a neutral or ion

and now a important question for examination 

Q. In which compound neutron is absent?

answer= hydrogen-1
read more about molecules on this link-

BONDING IN MOLECULES