Varsha Agrawal

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EDUCATION

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Wednesday, May 15, 2019

CELL

Cell is the fundamental unit of life.Depending upon number of cells.

  There are two types of cell:
* Unicellular
* Multicellular

Organism having one cell known as
unicellular organism.
 Organism having multiple cell known as muticellular organism.

CELL ORGANELL:

The organ present inside a cell known as cell organell.Such as nucleus,mitochondria.


* Every organism birth with a single cell after some years it become muticellular organism.

* Every cell is covered by membrane known as cell membrane.

CYTOPLASM:

Cytoplasm is a jelly like structure substance where all cell organell are present.

CELL MEMBRANE: (PLASMA MEMBRANE)

Cell membrane is a outer covering of cell.Because cell membrane allow only certain substances to entry or exit the cell.

Cell membrane is also known as semipermeable.

Cell membrane is made up of phospolipid (liquid and protein).Cell membrane maintain shape of cell and protect the cell.

CELL WALL:


Cell wall made up of cellulose outer most covering of plant.Cell wall is absent on animal.

Cell wall provide rigidity and protect from disaster.After cell wall cell membrane is also present.Cell wall can regenerate itself if it get damaged.

NUCLEUS:

Nucleus is central part of cell.

Nucleus is controlling part of cell.

Nucleus is brain of cell covered by nuclear membrane have nuclear pore allow substance to go inside and outside.

Nucleus has thread like structure known as chromosome but it appear as a rod shaped cell when cell is dividing.

It contain genes which contain heritary information made up of deoxyribo nucleic acid(DNA) and ribonucleic acid (RNA).

Absense of nuclear mambrane is known as nucleoid.


MAIN FUNCTION OF NUCLEUS:

** It helps in division of cell.

** It control all the activity of cell.
Now lets talk about another cell organelle i.e

MITOCHONDRIA:

It is a double membrane organelle.

It has its own deoxyribo nucleic acid(DNA) and proteins thats why it is able to make its own ribosomes.

FUNCTIONS OF MITOCHONDRIA:

** It help in realising energy in form of adenosine triphosphate.

GOLGI APPARATUS FUNCTION:

** It helps in formation of lysosomes.

** It makes simple sugar from complex sugar.

Lysosome:

Lysosome is also known as sucidial bags because if the cell get damaged it's enzymes eat whole cell.

PLASTID:

Plastid is only present in plant and responsible for nanufacture and storage of food.

  Plastid is of three types which are 

*chloroplast 
* chromoplast 
* leucoplast

VACUOLE:

* Vacuole is smaller in animals cell but larger in plant cell.

* Vacuole is bounded by a membrane tonoplast.

*Vacuoles are responsible for storage of food.
   

DIFFERENCE BETWEEN PLANT CELL AND ANIMAL CELL:-


Nothing too much ! I had already told you about this plastids are absent in animals cell ; cell wall are absent in animal cell but add one more thing with this all which is centrosomes ate absent in plant cell and present in animal cell.
   
Atlast at the end of  this essential and informative post we want to just bid goodbye all viewers and our next post will be soon to you.


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