Test: Protein & its Tests - JAMB MCQ

Proteins are polymers composed of amino acids. Amino acids are the building blocks of proteins, and they are linked together through peptide bonds to form protein chains.

The primary structure of a protein refers to the specific sequence of amino acids in the protein chain. It determines the overall structure and function of the protein.

The Biuret test is a chemical test used to detect the presence of proteins. It relies on the reaction between copper(II) ions and peptide bonds in proteins, which results in a color change from blue to violet.

The Ninhydrin test is a chemical test used to detect the presence of proteins. It reacts with the amino acids present in proteins to produce a purple color, indicating the presence of proteins.

Millon's test is a chemical test used to detect the presence of proteins containing aromatic amino acids, such as tyrosine and phenylalanine. It involves the reaction between Millon's reagent and the phenolic groups present in these amino acids, resulting in the formation of a red precipitate.

Xanthoproteic test is a chemical test used to detect the presence of proteins containing aromatic amino acids. When proteins containing aromatic amino acids are treated with concentrated nitric acid, a yellow color develops due to the formation of nitro compounds.

Hydrolysis of proteins involves the breaking of peptide bonds, which are the bonds that link amino acids together in a protein chain. It results in the formation of individual amino acids.

Hydrochloric acid (HCl) is commonly used for the hydrolysis of proteins. It provides the necessary acidic conditions to break down the peptide bonds and convert proteins into their constituent amino acids.

Protein hydrolysis breaks down proteins into their constituent amino acids. Fatty acids are not a product of protein hydrolysis; they are typically obtained from the hydrolysis of lipids.

The primary structure of a protein is determined by the specific sequence of amino acids in the protein chain. It serves as the foundation for the higher levels of protein organization, such as secondary, tertiary, and quaternary structures.