Unit 3 Energy Flow Concept 1 Enzymes and Biochemical Reactions

All of the chemical reactions within each cell of an organism

• Photosynthesis

• Cellular Respiration

• Metabolism

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The breaking and forming of bonds between different substances during chemical changes.

• Cellular Respiration

• Photosynthesis

• Chemical Reactions

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the amount of energy needed to make a chemical reaction start

• metabolism

• activation energy

substances that are changed during a chemical reaction

• products

• reactants

• enzymes

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substances that are made by a chemical reaction

• products

• reactants

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which type of reaction absorbs energy?

• endothermic

• exothermic

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Which type of reaction releases energy?

• endothermic

• exothermic

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The process of photosynthesis is ...

• endothermic

• exothermic

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The process of cellular respiration is ...

• endothermic

• exothermic

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Metabolic reactions are controlled by _____

• enzymes

• carbohydrates

• lipids

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