Which is not a true statement:
1. | α-carbon of α-amino acid is asymmetric except glycine. |
2. | Some proteins of human body are found in L-form |
3. | Human body can synthesize all proteins they need |
4. | At pH = 7 both amino and carboxylic groups exist in ionized form |
The structure that represents the peptide chain is:
1. | |
2. | |
3. | |
4. |
The helical structure of a protein is stabilized by:
1. | Hydrogen bonds | 2. | Ether bonds |
3. | Peptide bonds | 4. | Dipeptide bonds |
Which functional group participates in disulphide bond formation in proteins:
1. Thioether
2. Thiol
3. Thioester
4. Thiolactone