Question 1
Which of the following minerals is a negatively charged ion that counterbalances the role of the positively charged potassium and sodium?
◦ sulfur
◦ magnesium
◦ chloride
◦ copper
Question 2
Which of the following minerals is important for maintaining the ionic balance in cells, for bone formation, and for DNA and RNA function?
◦ iodine
◦ boron
◦ magnesium
◦ chromium