Question

How many of the following are chemically proteins?
Collagen, Trypsin, Inulin, Antibody, Receptor, lecithin

Answer 1

antibody

it increases our immunity....

Answer 2

To find:

Which of the following substances are chemically proteins ?

• Collagen
• Trypsin
• Inulin
• Antibody
• Receptor
• Lecithin

Solution:

Always remember the following thumb rules:

• Receptors are mainly proteins.

• Enzymes (except Ribozyme and Ribo-nuclease P) are all proteins.

So, among the given options the main proteins are collagen, trypsin, antibody receptor and lecithin.

• Collagen is a protein composed of polypeptide strands bound together by hydroxide linkages.

• Trypsin is an enzyme containing polypeptide change in tertiary structure.

• Antibodies are substances containing two heavy chain and two light chain polypeptides and hence are proteins.

• Receptors are mainly proteins as stated above.

Other options are eliminated:

• Inulin is a polysaccharide consisting of fructose as the repeating subunit.

• Lecithin is a lipid.

$\star$ Hope It Helps.