Mammalian Pantothenic Acid (Vitamin B5) Processing & Metabolism

The video tutorial explains the importance of vitamin B5, also known as pantothenic acid, and its role in human metabolism. It discusses the necessity of obtaining pantothenate through diet, as it cannot be synthesized by the body. The tutorial covers the different forms of pantothenic acid, including supplements like pantethine, and details the enzymatic processes that convert pantothenate into coenzyme A. It also highlights the functions of coenzyme A in fatty acid synthesis and other metabolic pathways.

What is the primary source of pantothenate for humans?

• Sunlight exposure

• Dietary intake

• Biosynthetic pathways

• Water consumption

Which enzyme is responsible for phosphorylating pantothenate?

• Pantothenate decarboxylase

• Pantothenate kinase

• Pantothenate synthetase

• Pantothenate oxidase

What is the role of 4 prime phospho pantothenate wheel cysteine synthetase?

• It phosphorylates pantothenate

• It oxidizes pantothenate

• It ligates cysteine to phospho pantothenate

• It removes a carboxyl group

How is pantethine formed?

• By decarboxylating pantothenate

• By phosphorylating pantothenate

• By oxidizing two molecules of pantheon

• By reducing pantheon

What is the function of 4 phospho pantheon adenylyl transferase?

• It removes a phosphate group

• It transfers an AMP moiety to phospho pantheon

• It ligates cysteine to pantothenate

• It oxidizes pantheon

Which molecule is a key intermediate in the TCA cycle and is activated by coenzyme A?

• Pyruvate

• Lactic acid

• Succinyl CoA

• Glucose

What is the mature and fully functional form of vitamin B5?

• Coenzyme A

• Pantothenate

• Pantethine

• Pantothenic acid