Question

Which one of the following statements about proteins is wrong?

• A. Protein occur in all living cells.
• B. Proteins generally contain nitrogen, carbon and hydrogen.
• C. Hydrolysis of proteins in acidic aqueous solution results in the formation of amino acids.
• D. Their solubilities in water don't reach minimum value at the isoelectric points.

Answer 1

The correct option is D Their solubilities in water don't reach minimum value at the isoelectric points.

At isoelectric point, the amino acid exists in the form of zwitterion.
At this point, the solubility of amino acid in water is maximum.