Language is a system of communication consisting of words used to express feelings to one another. Communication between native people is subjected to a common language however when it comes to developing international relations a common language is required which is spoken and understood by majority of the people. Today English is the third most spoken language in the world. English is a west germanic language that originated in the middle ages. Now it is a native language for UK, USA, Canada, Australia, and many other countries. Pakistan is a developing country. Although the native language is Urdu official language was declared English. All our parliamentary constitutions and laws are written in the English language. Just as Pakistan is a developing country, in the same way in Pakistan English is a developing language. It is not spoken or known by every person. To date, it is only spoken by the...
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Plasma Membrane : Plasma Membrane is the outermost boundary of the animal cell. It is also known as cell membrane or plasmalemma. Composition: Lipids 20-40% Proteins 60-80% Carbohydrates 1% Structure: It contains a lipid bilayer made of phospholipids in which the proteins are embedded. These proteins are not continuous rather embedded in a mosaic manner that is why the structure most widely accepted is known as the fluid mosaic model. The unit membrane model suggests that there is a continuous protein layer with phospholipids sandwiched in between. however this structure is not accepted. Lipids: Lipids in plasma membrane are of 2 types : Phospholipids which maintain the fluidity of the membrane and sterols which provide stability to the membrane. Proteins: Proteins may be integral proteins or non integral. They maybe transmembrane proteins or extrinsic and intrinsic proteins which are only present on the surface of the m...