Clinical Nutritionist CCN Micronutrients and Deficiencies 2

Question 1

Which B vitamin acts as a coenzyme in over 100 enzymatic reactions, particularly amino acid metabolism?

Accepted Answer

Pyridoxine (vitamin B6)

Answer

Riboflavin (vitamin B2)

Answer

Thiamine (vitamin B1)

Answer

Niacin (vitamin B3)

Question 2

Zinc deficiency is characteristically associated with which clinical finding?

Accepted Answer

Impaired taste and smell (hypogeusia/anosmia)

Answer

Scurvy

Answer

Pellagra

Answer

Wernicke's encephalopathy

Question 3

What is the Tolerable Upper Intake Level (UL) for preformed vitamin A (retinol) in adults?

Accepted Answer

3,000 mcg RAE/day

Answer

10,000 mcg RAE/day

Answer

900 mcg RAE/day

Answer

5,000 mcg RAE/day

Question 4

Selenium functions primarily as a component of which enzyme system that protects against oxidative stress?

Accepted Answer

Glutathione peroxidase

Answer

Superoxide dismutase

Answer

Catalase

Answer

Thioredoxin reductase

Question 5

Which fat-soluble vitamin acts as an antioxidant by protecting polyunsaturated fatty acids in cell membranes from oxidation?

Accepted Answer

Vitamin E (alpha-tocopherol)

Answer

Vitamin D

Answer

Vitamin A

Answer

Vitamin K

Question 6

A clinical nutritionist sees a patient with glossitis, angular stomatitis, and a 'magenta tongue.' Which deficiency is suspected?

Accepted Answer

Riboflavin (vitamin B2)

Answer

Niacin (vitamin B3)

Answer

Thiamine (vitamin B1)

Answer

Folate