CNSC Exam, Ch. 8: Vitamins and Trace
Elements questions with correct answers
What amount of retinol is equivalent to 24mcg of beta-carotene from food? A)
2mcg; B) 4mcg; C)2mg; D) 1mg CORRECT 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 CORRECT
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 CORRECT 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? CORRECT
ANSWER Retinoids in animal tissue; carotenoids in plants
Most stable form of vitamin A CORRECT ANSWER retinyl ester
Chronic intake of retinol may contribute to CORRECT ANSWER development of
osteoporotic hip fractures
Active form of Vitamin D CORRECT ANSWER Calcitriol
Parathyroid hormone increases/decreases blood calcium levels CORRECT
ANSWER Increases
