Q: When the hemoglobin loses its oxygen, it changes to what color? Choices: - purple red - grayish red - light pink - bluish red A:
bluish red
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Q: Memory t cells are long-lived and can even persist for how long? Choices: - eons - days - minutes - lifetime A:
lifetime
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Q: Hydrogen sulfide is a noxious and toxic gas produced from decaying organic matter that contains what? Choices: - tin - methane - helium - sulfur A:
sulfur
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Q: What is a small protein that helps fight infections? Choices: - phenotype - zygote - glutamate - cytokine A:
cytokine
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