Vitamins and Minerals | Vitamin C Biosynthesis & the GULO Pseudogene

The video explains the role of glucuronic acid in metabolic pathways and its conversion to vitamin C. It highlights the inability of certain organisms, including humans, to synthesize vitamin C due to a nonfunctional enzyme. The importance of vitamin C as an essential dietary component and its role as an antioxidant is discussed, emphasizing the need for dietary intake or supplementation.

What is the primary role of glucuronic acid in the metabolic pathway discussed?

• To produce energy

• To convert into vitamin C

• To initiate the pentose phosphate pathway

• To synthesize glucose

Which enzyme is responsible for the cyclization of colonic acid?

• Glucuronate reductase

• Galano 14 lactone hydrolase

• NADPH oxidase

• Urate oxidase

Why can't humans synthesize vitamin C?

• They have an excess of uric acid

• They do not consume enough fruits

• They lack glucose

• They have a nonfunctional gulo pseudogene

Which organisms are unable to synthesize vitamin C?

• All mammals

• All primates

• Only humans

• Guinea pigs, fruit bats, and haplorhines

What is the major function of vitamin C in the body?

• Energy production

• Protein synthesis

• Antioxidant activity

• Calcium absorption

What is the primary antioxidant in human blood?

• Vitamin E

• Glucose

• Vitamin C

• Uric acid

Why is it recommended for humans to take vitamin C supplements?

• To enhance protein synthesis

• To ensure adequate antioxidant intake

• To increase energy levels

• To improve calcium absorption