Question

Identify the statement which is incorrect.

• A. Sulphur is an integral part of cysteine
• B. Glycine is an example of lipids
• C. Lecithin contains phosphorus atom in its structure
• D. Tyrosine possesses aromatic ring in its structure

Answer 1

The correct option is B Glycine is an example of lipids

Glycine is not a lipid. It is an amino acid. The R group in glycine consists of a hydrogen atom.

Fig: Glycine

Cysteine is a sulphur containing amino acid.


Lecithin is a phospholipid. Phospholipids are esters of two molecules of fatty acids with a glycerol molecule and also have a phosphate group attached to it.


Aromatic amino acids are those which have an aromatic ring in their structure. There are 20 amino acids, out of which the three aromatic amino acids are - tryptophan, tyrosine and phenylalanine.