Question

Aerobic dehydrogenase in biological oxidation contains:

• A. NAD
• B. NADH
• C. NADP
• D. FMN \& FAD

Hint:

Aerobic dehydrogenases are flavoproteins containing FMN and FAD, crucial for transferring electrons in the electron transport chain.

Answer 1

The Correct Option is D

Step 1: Role of aerobic dehydrogenases in biological oxidation. Aerobic dehydrogenases are enzymes that play a crucial role in biological oxidation by transferring electrons from substrates to the electron transport chain during aerobic respiration. 
Step 2: Coenzymes associated with aerobic dehydrogenases. Aerobic dehydrogenases primarily use flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) as their coenzymes. These flavins are involved in redox reactions, acting as electron carriers. 
Step 3: Why other options are incorrect. - (A) NAD: Nicotinamide adenine dinucleotide is used by other dehydrogenases, such as those in glycolysis and the Krebs cycle, but not predominantly in aerobic dehydrogenases. 
- (B) NADH: Refers to the reduced form of NAD, a product of some metabolic pathways, not directly contained in aerobic dehydrogenases. 
- (C) NADP: Nicotinamide adenine dinucleotide phosphate is used in anabolic pathways, not in aerobic dehydrogenation.