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Questions and Answers
What are vitamins classified into two categories based on their solubility?
What are vitamins classified into two categories based on their solubility?
- Fat-soluble and water-soluble (correct)
- Fat-soluble and water-insoluble
- Fat-soluble and protein-soluble
- Fat-soluble and carbohydrate-soluble
What is the primary function of water-soluble vitamins?
What is the primary function of water-soluble vitamins?
- To provide energy to the body
- To synthesize amino acids and proteins
- To store energy in the liver and adipose tissue
- To act as coenzymes for enzymes in intermediary metabolism (correct)
Which vitamin is essential for the biosynthesis of several compounds?
Which vitamin is essential for the biosynthesis of several compounds?
- Thiamine
- Riboflavin
- Folic acid (correct)
- Niacin
What happens when vitamins A and D are consumed in excess of the Dietary Reference Intakes (DRIs)?
What happens when vitamins A and D are consumed in excess of the Dietary Reference Intakes (DRIs)?
What is the result of a lower than normal concentration of hemoglobin in the blood?
What is the result of a lower than normal concentration of hemoglobin in the blood?
What is the primary function of tetrahydrofolate?
What is the primary function of tetrahydrofolate?
Which population is particularly susceptible to folic acid deficiency?
Which population is particularly susceptible to folic acid deficiency?
What is the compound synthesized in the presence of folic acid?
What is the compound synthesized in the presence of folic acid?
Which of the following is a primary source of pantothenic acid?
Which of the following is a primary source of pantothenic acid?
What is the main function of retinoic acid in the body?
What is the main function of retinoic acid in the body?
What is the term for the family of molecules related to retinol (vitamin A)?
What is the term for the family of molecules related to retinol (vitamin A)?
What is the result of the oxidation of retinol?
What is the result of the oxidation of retinol?
What is the function of retinal in the body?
What is the function of retinal in the body?
What is the result of the oxidative cleavage of β-carotene in the intestine?
What is the result of the oxidative cleavage of β-carotene in the intestine?
What is the role of the intestinal mucosa in the absorption of vitamin A?
What is the role of the intestinal mucosa in the absorption of vitamin A?
What is the form in which vitamin A is transported from the intestine to the liver?
What is the form in which vitamin A is transported from the intestine to the liver?
What is the role of 11-cis retinal in the visual cycle?
What is the role of 11-cis retinal in the visual cycle?
Which symptom is an early sign of vitamin A deficiency?
Which symptom is an early sign of vitamin A deficiency?
Which vitamin A form is inactive in maintaining reproduction and the visual cycle?
Which vitamin A form is inactive in maintaining reproduction and the visual cycle?
What is the recommended dietary allowance (RDA) of vitamin A for adult females?
What is the recommended dietary allowance (RDA) of vitamin A for adult females?
Why are animals given vitamin A only as retinoic acid from birth blind and sterile?
Why are animals given vitamin A only as retinoic acid from birth blind and sterile?
What role do yellow and dark green vegetables play in vitamin A nutrition?
What role do yellow and dark green vegetables play in vitamin A nutrition?
What is the role of vitamin A in the maintenance of epithelial cells?
What is the role of vitamin A in the maintenance of epithelial cells?
How is vitamin A used in clinical treatments?
How is vitamin A used in clinical treatments?
What are FMN and FAD bound to in flavoenzymes?
What are FMN and FAD bound to in flavoenzymes?
What are common symptoms of riboflavin deficiency?
What are common symptoms of riboflavin deficiency?
What role does biotin play in carboxylation reactions?
What role does biotin play in carboxylation reactions?
What glycoprotein in raw egg whites prevents the absorption of biotin?
What glycoprotein in raw egg whites prevents the absorption of biotin?
Why does biotin deficiency not naturally occur?
Why does biotin deficiency not naturally occur?
What component of coenzyme A (CoA) carries acyl compounds?
What component of coenzyme A (CoA) carries acyl compounds?
What is required to induce a biotin deficiency syndrome with a normal diet?
What is required to induce a biotin deficiency syndrome with a normal diet?
What deficiency frequently accompanies riboflavin deficiency?
What deficiency frequently accompanies riboflavin deficiency?
Why is it recommended that all newborns receive a single intramuscular dose of vitamin K?
Why is it recommended that all newborns receive a single intramuscular dose of vitamin K?
What can prolonged administration of large doses of synthetic vitamin K (menadione) cause in infants?
What can prolonged administration of large doses of synthetic vitamin K (menadione) cause in infants?
Which of the tocopherols is the most active form of vitamin E?
Which of the tocopherols is the most active form of vitamin E?
What is the primary function of vitamin E?
What is the primary function of vitamin E?
Which foods are rich in vitamin E?
Which foods are rich in vitamin E?
What is the recommended dietary allowance (RDA) for alpha-tocopherol in adults?
What is the recommended dietary allowance (RDA) for alpha-tocopherol in adults?
Who is most likely to experience vitamin E deficiency?
Who is most likely to experience vitamin E deficiency?
Why is vitamin E not recommended for the prevention of chronic diseases like coronary heart disease or cancer?
Why is vitamin E not recommended for the prevention of chronic diseases like coronary heart disease or cancer?
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