Class 12th

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

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.

This is a Short Type Questions as classified in NCERT Exemplar

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

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.

This is a Short Type Questions as classified in NCERT Exemplar

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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

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

Aldo-pentoses like ribose and 2 - deoxyribose are sugar moieties found in nucleic acids like RNA and DNA. The structures of these sugars are illustrated below. Both aldopentoses' D- configuration is configuration.

β−D-ribose is mentioned, and its structure is depicted below.

The structure of as β−D-deoxyribose, 2 - deoxyribose is given in the diagram below.

This is a Short Type Questions as classified in NCERT Exemplar

Ans: On reaction with hydrochloric acid, aniline forms anilinium chloride ion which is water soluble. Therefore, the aniline solubility in aqueous HCl solution.