*Question*
Q: What compound has positive and negative ions? Read this paragraph and choose the correct option from the provided answers: Ionic compounds have positive ions and negative ions. Choices: - hydrocarbon - protein - covalent - ionic A:
**Answer**
ionic

*Question*
Q: What is the second stage of cellular respiration? Read this paragraph and choose the correct option from the provided answers: The pyruvate molecules from glycolysis next enter the matrix of a mitochondrion. That's where the second stage of cellular respiration takes place. This stage is called the Krebs cycle . During this stage, two more molecules of ATP are produced. Other energy-storing molecules are also produced (to be used to make more ATP in stage 3). The Krebs cycle requires oxygen. Anything that needs oxygen is described as aerobic . The oxygen combines with the carbon from the pyruvate molecules. This forms carbon dioxide, a waste product. Choices: - beatnik cycle - duocycle - marr cycle - krebs cycle A:
**Answer**
krebs cycle

*Question*
Q: Which element has an atomic number of 16? Read this paragraph and choose the correct option from the provided answers: The atomic number of sulfur is 16. Therefore, in a neutral atom of sulfur, there are 16 electrons. Saylor URL: http://www. saylor. org/books. Choices: - acid - methane - oxygen - sulfur A:
**Answer**
sulfur

*Question*
Q: In which state does matter need to be for nuclear fusion? Read this paragraph and choose the correct option from the provided answers: Unfortunately, using energy from nuclear fusion is far from a reality. Scientists are a long way from developing the necessary technology. One problem is raising temperatures high enough for fusion to take place. Another problem is that matter this hot exists only in the plasma state. There are no known materials that can contain plasma, although a magnet might be able to do it. That's because plasma consists of ions and responds to magnetism. You can learn more about research on nuclear fusion at the URL below. Choices: - cells state - solid state - gaseous state - plasma state A:
**Answer**
plasma state