Question

In the modern system of nomenclature, which one of the following enzymes occupies the Ist position?
A. Oxidoreductase
B. Transferase
C. Hydrolase
D. Ligase

Answer 1

The modern system of nomenclature was invented by a Swedish botanist Carl Linnaeus. Enzymes are biological molecules that are involved in various types of chemical reactions. Mostly the enzymes are proteinaceous substances. They are the linear chain of amino acids that forms a three-dimensional structure. Non- proteinaceous substances that are associated with the enzymes are called cofactors.

Complete answer:
The enzymes have been categorized into six classes according to the modern system of classification.
-First-class is Oxidoreductases.
-The second class is Transferases.
-The third class is Hydrolase.
-The fourth class is Lyase.
-The fifth class is Isomerase.
-The sixth class is Ligase.
-Oxidoreductase is an enzyme that catalyzes the shifting of electrons from the electron donor to the electron acceptor.
In the modern system of nomenclature, Oxidoreductase enzymes occupy the first position.
Hence, the correct answer is option (A).

Additional information:
-The reductant is the electron donor whereas the oxidant is the electron acceptor.
-Oxidoreductase utilizes NADH or NAD+ as cofactors.
-Transferase is an enzyme that catalyzes the transfer of particular functional groups from one molecule to another.
-Hydrolase is an enzyme that makes use of water to split a chemical bond and results in the breakdown of larger molecules into smaller ones

Note: The enzymes have been categorized into six classes according to the modern system of classification. First-class is Oxidoreductases. Oxidoreductases are the enzymes that catalyze the oxidation and reduction reactions. Oxidoreductase utilizes NADP+ or NAD+ as cofactors. The movement of ions through the plasma membrane occurs through enzymes.