Insulin in Humans

Q.

Which of the following is true about human insulin?

1. Human insulin has two polypeptide chains.

2. Two polypeptide chains are connected by disulphide bridges.

3. All of the above.

4. Proinsulin has A, B and C chains.

Q.

Maturation of proinsulin into insulin takes place after

1. Joining of C – peptide

2. Removal of C – peptide

3. Removal of disulphide bridge

4. Addiion of disulphide bridge

Q. Mature insulin is different from pro-insulin in

1. Having more number of nucleotides
2. Having more number of amino acids
3. Causing allergic reactions
4. The absence of C - Peptide

Q.

Chemical hormones are _____.

1. Amino acid and peptide derivatives

2. Proteins

3. Steroids only

4. All the above