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CNSC Exam Questions and Answers- Ch. 8- Vitamins and Trace Elements
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CNSC Exam Questions and Answers- Ch. 8- Vitamins and Trace Elements
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CNSC Exam, Ch. 8: Vitamins and TraceElements
What amount of retinol is equivalent to 24mcg of beta-carotene from food? A) 2mcg; B) 4mcg; C)2mg;
D) 1mg - Answer -A) 2mcg. One mcg retinol has the vitamin A activity of 12mcg beta-carotene
Which of the following nutrients does NOT engage in conversion of homocysteine to methionine? A)
Choline; B) Vitamin D; C) Vitamin B12; D) Folate - Answer -B) Vitamin D
Which of the following trace elements is regulated at the level of absorption but not excretion? A) Zinc;
B) Copper; C) Manganese; D) Iron - Answer -D) Iron. It is very difficult to eliminate iron except in
conditions of blood loss
Generally vitamin A exists as what in animal tissue and what in plants? - Answer -Retinoids in animal
tissue; carotenoids in plants
Most stable form of vitamin A - Answer -retinyl ester
Chronic intake of retinol may contribute to - Answer -development of osteoporotic hip fractures
Active form of Vitamin D - Answer -Calcitriol
Parathyroid hormone increases/decreases blood calcium levels - Answer -Increases
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