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Give one difference between slime layer and capsule?


Slime layer is a loose sheath like layer of glycocalyx. Whereas the capsule is a thick and tough layer.
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Draw diagrams of plant cell and animal cell.


. Draw diagrams of plant cell and animal cell.
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Define osmosis, endosmosis and exosmosis.

Osmosis is the process of diffusion of water from a region of its higher concentration to the region of its lower concentration, across a semi-permeable membrane. 
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Describe cell wall.

The cell wall was first observed by Robert Hooke in 1665 in a thin slice of cork. Cell wall is a characteristics feature of prkaryotes (except mycoplasma) and plant cells. It is absent in animal cells. The cell wall is usually composed of cellulose. It may consist of other substances like lignin, pectin, hemi-cellulose etc. The cell wall has three layers called primary cell wall, secondary cell wall and middle lamellae. It determines the shape of the cell and provides structural support to the cell. 

 

 

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Briefly explain the composition of cell wall. 

Cell wall is usually made of cellulose. It may consist of hemicellulose, pectins  galactans, mannans, minerals like calcium carbonate and proteins.

 

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