Question
Chemistry Question on Proteins
Plasmamembrane is made of
A
proteins and carbohydrates
B
proteins and lipids
C
proteins, lipids and carbohydrates
D
proteins, some nucleic acid and lipids.
Answer
proteins, lipids and carbohydrates
Explanation
Solution
Plasma membrane consists of lipids (20-79%), proteins (20-70%), carbohydrates (1-5%) and water (20%). Lipid molecules possess both hydrophobic and hydrophilic ends and are thus arranged in the form of lipid bilayer. Most common lipid of the bilayer is phospholipid. Protein molecules occur at places both inside (intrinsic proteins) and on the outer side (extrinsic proteins) of the phospholipid bilayer.