Context: Zinc is an essential mineral perceived by the public today as being of "exceptional biologic and public health importance", especially regarding prenatal and postnatal development. Zinc deficiency affects about two billion people in the developing world and is associated with many diseases. In children it causes growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea. Enzymes with a zinc atom in the reactive center are widespread in biochemistry, such as alcohol dehydrogenase in humans. Consumption of excess zinc can cause ataxia, lethargy and copper deficiency.

Question: How many people are affected by zinc deficiency?
Answer: two billion

Question: What can consumption of excess zinc cause?
Answer: ataxia, lethargy and copper deficiency

Question: Where can you find enzymes with a zinc atom in the reactive center?
Answer: biochemistry,

Question: What can a lack of zinc cause in children?
Answer: growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea

Question: What is extremely important to prenatal and postnatal development?
Answer: Zinc

Question: What can cause symptoms in children ranging from diarrhea to retarded growth?
Answer: Zinc deficiency

Question: In what substance can you find a zinc atom within its reactive center?
Answer: alcohol dehydrogenase

Question: What causes symptoms such as lethargy and copper deficiency?
Answer: excess zinc

Question: How many people are affected by zinc immunity?
Answer: Unanswerable

Question: What can consumption of normal zinc cause?
Answer: Unanswerable

Question: What can cause symptoms in plants ranging from diarrhea to retarded growth?
Answer: Unanswerable

Question: What substance can you find a zinc atom without a center?
Answer: Unanswerable

Question: What causes symptoms such as leprosy and copper deficiency?
Answer: Unanswerable