Coenzymes

Question 1

What is the primary function of NAD (Nicotinamide adenine dinucleotide)?

Answer 1

NAD primarily functions in redox reactions, transferring electrons from one reaction to another in cellular metabolism.

Question 2

How does NADP (Nicotinamide adenine dinucleotide phosphate) differ from NAD?

Answer 2

NADP is similar to NAD but is typically involved in anabolic reactions, supplying reducing power for biosynthetic pathways.

Question 3

What role does FAD (Flavin adenine dinucleotide) play in metabolism?

Answer 3

FAD acts as a redox-active coenzyme in various metabolic pathways, including the citric acid cycle and the electron transport chain.

Question 4

What is the function of Coenzyme A (CoA) in the cell?

Answer 4

Coenzyme A is crucial for the synthesis and oxidation of fatty acids and the oxidation of pyruvate in the citric acid cycle by carrying acyl groups.

Question 5

What is Thiamine pyrophosphate (TPP) and why is it important?

Answer 5

TPP is the active form of vitamin B1 and is essential for the decarboxylation of α-keto acids in energy metabolism.

Question 6

What is the role of Pyridoxal phosphate (PLP) in the body?

Answer 6

PLP is the active form of vitamin B6 and acts as a coenzyme in various reactions of amino acid metabolism.

Question 7

How does Biotin function as a coenzyme?

Answer 7

Biotin serves as a coenzyme for carboxylase enzymes, which are involved in processes like fatty acid synthesis and gluconeogenesis.

Question 8

What is the significance of Coenzyme Q10 (Ubiquinone) in cellular energy production?

Answer 8

Coenzyme Q10 is involved in the electron transport chain and plays a vital role in the production of cellular energy.