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Type: Multiple-Choice
Category: Biochemistry
Level: Grade 9
Tags: living things
Last Modified: 3 days ago

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Biochemistry Question

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Grade 9 Biochemistry

In living cells, which four elements are the most abundant?
  1. carbon, oxygen, nitrogen, and sulfur
  2. carbon, oxygen, hydrogen, and nitrogen
  3. carbon, oxygen, sulfur, and phosphorus
  4. carbon, sulfur, hydrogen, and magnesium
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