Answer the following question given this paragraph: As Melvin Calvin discovered, carbon fixation is the first step of a cycle. Like an electron transport chain, the Calvin Cycle, shown in Figure below , transfers energy in small, controlled steps. Each step pushes molecules uphill in terms of energy content. Recall that in the electron transfer chain, excited electrons lose energy to NADPH and ATP. In the Calvin Cycle, NADPH and ATP formed in the light reactions lose their stored chemical energy to build glucose. Q: Carbon fixation is the first step of what cycle involving light reactions? Choices: - sun cycle - life cycle - water cycle - calvin cycle A:
calvin cycle
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Answer the following question given this paragraph: A carcinogen is anything that can cause cancer. Cancer is a disease in which cells divide out of control. Most carcinogens cause cancer by producing mutations in DNA. Q: What is the term for anything that can cause cancer? Choices: - contaminate - chemical - contamination - carcinogen A:
carcinogen
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Answer the following question given this paragraph: People use fresh water from aquifers from springs or wells. Q: What do people use from aquifers from springs or wells? Choices: - oxygen - salt - soil - fresh water A:
fresh water
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Answer the following question given this paragraph: Steroids (or sterols) have several functions. Sterols are a subgroup of steroids. The sterol cholesterol is an important part of cell membranes and plays other vital roles in the body. Cholesterol is a precursor to fat-soluble vitamins and steroid hormones. Steroid hormones include the male and female sex hormones. Sterols also have roles as second messengers in signalling pathways. Q: Sterols are a subgroup of what? Choices: - nuclides - nutrients - antibiotics - steroids A:
steroids
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