Q: Q: Mars appears red because of large amounts of which element in the soil? Choices: - carbon - coal - mercury - iron A:
A: iron

Q: Q: Metalloids, metals, and nonmetals are all classes of what? Choices: - compounds - protons - matter - elements A:
A: elements

Q: Q: Dinitrophenol (dnp) is an uncoupler that makes the inner mitochondrial membrane leaky to protons. it was used until 1938 as a what? Choices: - immune system booster - bone density drug - sleep loss drug - weight loss drug A:
A: weight loss drug

Q: Q: What kind of cells have positive cell potentials, and all the reduction reactions are reversible? Choices: - new cells - inhibited cells - neutral cells - galvanic cells A:
A: galvanic cells