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11. What is the main source of natural fluoride?
A. Mushrooms
B. Potatoes
C. Meat
D. Water
12. Which of the following mineral is involved in the enzyme -controlled energy-yielding reactions of metabolism?
A. Calcium
B. Phosphorus
C. Iron
D. Copper
13. The mineral which aids in the utilization of iron and in hemoglobin synthesis is
A. calcium
B. phosphorus
C. cobalt
D. copper
14. The mineral which is considered important in maintaining electrical potential in nerves and membranes is
A. magnesium
B. manganese
C. calcium
D. iron
15. Wilson’s disease is an example of __________ and Menkes’ syndrome is an example of __________ .
A. zinc deficiency; zinc toxicity
B. zinc toxicity; zinc deficiency
C. copper deficiency; copper toxicity
D. copper toxicity; copper deficiency
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