Metabolism Chapter 3

True or False. Cells need oxygen molecules and glucose molecules to react to make energy?

• True.

• False.

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If someone is eating plenty of starch and their cells have glucose molecules, what other reason could they feel so tired?

• They might not be getting enough oxygen molecules.

• They might not be getting enough exercise.

• They might not be drinking enough water.

• They might not be stretching when they get up in the morning.

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In cellular respiration, oxygen and glucose molecules...

• rearrange to form carbon dioxide and water when energy is made.

• get used up and disappear when energy is made.

• split into smaller pieces of oxygen and glucose molecules when energy is made.

• combine to form amino acids using energy from the cell.

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An athlete thinks that she can exercise as long as she eats different types of food because her body only needs different types of food molecules to work properly. Is the athlete correct?

• No, her muscles do not need molecules from food, because all cells make all the molecules they need.

• No, only her stomach cells need food molecules to work properly.

• Yes, her cells only work when they have molecules from different types of food.

• No, all cells need molecules from both food and molecules from air to work properly.

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Doctors tested a patient to find out what molecules were in her cells. Her cells contained normal levels of oxygen molecules, low levels of amino acid molecules, and normal levels of glucose molecules. How might this affect the patient?

• As long as her cells have enough oxygen, her body will function normally.

• Her body would have to work harder to break down more glucose into amino acids, since they are low.

• The patient would not be able to exercise, because her cells need amino acids to react with oxygen to release enough energy.

• The patient would not grow at a normal rate, because the cells need amino acids for growth and repair.

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Elisa has diabetes, which keeps glucose from getting into the cells. How does this affect her body?

• It allows her to exercise more, because it keeps the glucose in the circulatory system to make energy.

• It makes her sad, because her cells won't be able to grow into bigger molecules.

• It makes her tired, because her cells need glucose to build new proteins that create energy

• It makes her tired, because her cells need glucose to react with oxygen to create energy.

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What is metabolism?

• the process of making clear how your evidence supports your claim

• the process that combines amino acids to form larger protein molecules

• the body's use of molecules for growth and repair

• a chemical reaction between glucose and oxygen that releases energy

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What is glucose?

• a proposed answer to a question about the natural world

• a category of large molecules that make cell parts and perform important functions

• information about the natural world that is used to support or go against a claim

• a molecule that organisms can use to release energy

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Sanctorious found that he was lighter some time after eating, but before going to the bathroom. Why?

• It's because oxygen and glucose are destroyed to create energy, making him lighter.

• It's because he did not eat enough food for the day, so he lost weight.

• It's because carbon dioxide is created and that is breathed out, making him lighter.

• It's because energy causes people to run around more, so he lost weight.

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During cellular respiration...

• new atoms form when energy is made.

• new atoms cannot be made.

• new atoms combine to form molecules.

• new atoms are destroyed.

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