Chemistry

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When glucose is acetylated with acetic anhydride, a penta-acetyl derivative is produced. The reaction is depicted in the diagram below.

This confirms the presence of five -OH groups.

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During the curdling process, the lactose sugar in milk is converted to lactic acid.

Milk curdling is caused by lactic acid-producing bacteria found in milk. Protein denaturation is an example. When a protein is exposed to physical or chemical alterations, it is said to be modified. The hydrogen bond has been shattered. Globules open up, helices uncoil, and proteins lose their biological function.

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This is an example of an electrophilic aromatic substitution reaction. phenol generates phenoxide ion in alkaline medium, which is more electron-rich than phenol and thus more reactive to electrophilic attack. In this reaction, the electrophile is an aryldiazonium cation.

The faster the reaction, the stronger the electrophile.

The cation p-nitrophenyldiazonium is a stronger electrophile than the cation p-toluene diazonium.

As a result, it preferentially couples with phenol.

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Oxidoreductases are enzymes that participate in redox reactions that involve oxidation reduction. They act as catalysts; one of these enzymes is Alcohol Dehydrogenase, which decreases the amount of alcohol in the human body after ingestion.

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The formation of intramolecular H-bonding between the >C=O groups of amino acids in one turn and the? NH? groups of amino acids in the following turn stabilises a polypeptide chain in the a-helix shape of protein.

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This is a Short Answer Type Questions as classified in NCERT Exemplar

To make a polypeptide chain, the amino acid must be linked to the α− carbon of the molecule. The removal of water molecules from an α− amino acid results in the formation of a polypeptide chain.

This is a Short Type Questions as classified in NCERT Exemplar

This is a Short Type Questions as classified in NCERT Exemplar