Question

In which of the following phosphoglycerides are the main component
1. ER
2. Plasma Membrane
3. Ribosome
4. Lysosome​

Answer 1

Answer:

Your correct answer is option 2

Explanation:

The main component of plasma membrane are phosphoglycerides.

Some Other characteristics of plasma membrane are as follows

• It is composed of protein 52%, liquid 40% and carbohydrates.
• The ratio of protein and lipid varies in different cell types or cell to cell and body to body.
• Depending on ease of extraction membrane proteins can be categorised into two types (i) Integral proteins- Those are partially or fully buried into the layer of lipid. (ii) Peripheral Protein- They are present at the surface of the lipid layer which can be seperated easily.
• Most accepted model of the structure of the cell membrane is Fluid Mosaic Model and it was proposed by two scientists Singer and Nicolson in 1972.
• According to Fluid Mosaic Model proteins are of qualsified nature which means that they can move laterally within the lipid layer.
• In the model it said that lipids are arranged in a bilayer with hydrophilic or polar heads towards outside and hydrophilic or non-polar tail towards the inner side.
• Membrane to be in fluid is very important because it performs many important functions like cell growth,secretion, endocytosis, cell division etc.

Answer 2

Answer:

1.ER

√ 2.plasma membrane

3. Ribosome

4. Lysosome

Answer : (2) Plasma membrane .