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Saturday, June 23, 2012

Cell Nucleus

* Cell Nucleus act as the brain of the cell
* It helps to control eating breathing like things
* Many cells have one nucleus and some have many
* Usually it has a Globular shape
* In animal Cells it is in the middle but in plant cells it is shifted to a side
* All cells do not have nucleus
* Only  eukaryotic  cells having it that is why it it is call as Nucleus cells
* Cell nucleus can divide in to two by its own.
* Nucleus division occur when Cell division occur let's discuss it under Cell division
* Parts of a nucleus
  • Nucleus Membrane
  • Nucleolus
  • Chromatin
Nucleus membrane
 Nucleus membrane around the nucleus protects the nucleus from mechanical and other injuries.
2 parts of it
         inner membrane
         outer membrane


Chromatin
Chromatin contains Protein,RNA and DNA which controls the functions of the Cell.
Nucleolus  
RNA and protein makes the Nucleolus it is inside the nucleus
.
*Apart from above parts nucleus plasma fills whole nucleus.


      Structure of the nucleus 

Saturday, March 3, 2012

Significant Differences Between Plant Cell & Animal Cell

Plant Cell Animal Cell
  • Have Chloroplast
  • Involve in photosynthesis
  • Have Cell wall made with Cellulose
  • One very large vacuole in the center
  • Rectangular shape
  • Do not have Chloroplast
  • Don't involve in photosynthesis
  • No Cell wall
  • Small vacuoles
  • No shape

Plant Cell

Outer boundary is cell wall
Plant cell have a cell wall
Having Chloroplasts for photosynthesis
Eukaryotic cells
basic structure is same to animal cell


Consists with
Cell wall
Chloroplast
Endoplasmic Reticulum
Golgi
Nucleus
Ribosomes
Vacuole