101.Which of the following conditions is a common side effect from taking iron supplements?

a.itching

b.diarrhea

c.constipation

d.black tongue

102.What is the RDA for iron for females 19–50 years old?

a.8 mg

b.10 mg

c.18 mg

d.32 mg

103.A(n) enzyme in which zinc or copper is an integral part of its structure is classified as which of the following?

a.metalloenzyme

b.enteroenzyme

c.cytochromidase

d.metallothionase

104.Zinc is required as a cofactor by more than how many enzymes?

a.100

b.125

c.150

d.172

105.Which of the following pairs defines an association between a protein and a function of zinc?

a.thyroxine: zinc transporter

b.globulin: transports zinc into cells

c.transferrin: essential to zinc excretion

d.metallothionein: promotes zinc homeostasis

106.Which of the following is a major binding protein for zinc?

a.heparin

b.ferritin

c.hemosiderin

d.metallothionein

107.Which of the following is known to regulate the absorption of zinc?

a.metallothionein in the intestinal cells

b.zinc-releasing enzymes in the intestinal mucosa

c.pancreatic juice containing zinc-absorption enhancers

d.bile acids which form a complex with zinc to promote its absorption

108.What is the bioavailability of dietary zinc?

a.2–5 percent

b.5–10 percent

c.15–40 percent

d.50–60 percent

109.Which of the following minerals undergoes enteropancreatic circulation during normal metabolism?

a.iron

b.zinc

c.copper

d.fluoride

110.Which of the following organs recycles zinc?

a.pancreas

b.heart

c.kidneys

d.gallbladder