An example of oxidation - reduction enzyme is

SAfolabi

7 years ago

A dehydrogenase (also called DH or DHase or quinone) is an enzyme belonging to the group of oxidoreductases that oxidizes a substrate by reducing an electron acceptor, usually NAD+/NADP+ or a flavin coenzyme such as FAD or FMN. They also catalyze the reverse reaction, for instance alcohol dehydrogenase not only oxidizes ethanol to acetaldehyde in animals but also produces ethanol from acetaldehyde in yeast.

Wywex

1 year ago

The correct answer is:

D. Dehydrogenase


Explanation:

Dehydrogenases are enzymes that catalyze oxidation-reduction (redox) reactions by removing or adding hydrogen atoms (protons and electrons) from substrates. They play a key role in metabolic pathways like cellular respiration and photosynthesis.

Oxidation: The enzyme removes hydrogen from a molecule (electron loss).

Reduction: The removed hydrogen is transferred to an acceptor, such as NAD⁺ or FAD, reducing it to NADH or FADH₂.


Why Not the Others?

A. Amylase → Breaks down starch into simple sugars (no redox involved).

B. Protease → Breaks down proteins into amino acids (not a redox reaction).

C. Lipase → Breaks down fats into glycerol and fatty acids (not a redox reaction).


Only dehydrogenase is directly involved in oxidation-reduction reactions!