Which one of the following statements about proteins is wrong?
Protein occur in all living cells.
Hydrolysis of proteins in acidic aqueous solution results in the formation of amino acids.
Proteins generally contain nitrogen, carbon and hydrogen.
Their solubilities in water don't reach minimum value at the isoelectric points.
A
Protein occur in all living cells.
B
Proteins generally contain nitrogen, carbon and hydrogen.
C
Their solubilities in water don't reach minimum value at the isoelectric points.
D
Hydrolysis of proteins in acidic aqueous solution results in the formation of amino acids.
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Solution
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At isoelectric point, the amino acid exists in the form of zwitterion. At this point, the solubility of amino acid in water is maximum.
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