Eukaryotic Cell - Cell Membrane (1)

Question 1

Introduction to Cell Membrane

Answer 1

Chemical studies on the cell membrane especially in human red blood cells ( erythrocytes) enabled the scientist to deduce the possible structure of cell membrane

Question 2

Composition of cell membrane

Answer 2

Cell membrane is composed into Proteins and Lipids

Question 3

Comment about Lipids and Bilayer

Answer 3

The major lipids are phospholipids that are arranged in bilayer

Question 4

How are phospholipids arranged in bilayer?

Answer 4

the lipids arranged within the membrane are such that polar heads are towards outer side
and hydrophobic tails towards the inner part.

Question 5

Why are they arranged in such a manner?

Answer 5

This ensures that the non polar tail of saturated hydrocarbons is protected from aqueous environment

Question 6

More about Phospholipid

Answer 6

Cholestrol is present in phospolipid membrane

Question 7

What did the biochemical investigation reveal about cell membrane?

Answer 7

cell membrane also posses protein and carbohydrates

Question 8

The ratio of proteins and lipids

Answer 8

The ratio of protein and lipids varies considerably in different cell types

Question 9

What about the ratio in Human Beings

Answer 9

membrane of an erythrocyte (RBC) has approximately 52 percent protein and 40 percent lipids.