Describe the properties of enzymes. Explain how enzymes affect the rate of biological reactions. Explain how changes to the structure of an enzyme may affect its function. Explain how the cellular environment affects enzyme activity. Describe the role of energy in living organisms. Describe the photosynthetic processes that allow organisms to capture and store energy. Explain how cells capture energy from light and transfer it to biological molecules for storage and use. Describe the processes that allow organisms to use energy stored in biological macromolecules. Explain how cells obtain energy from biological macromolecules in order to power cellular functions. Explain the connection between variation in the number and types of molecules within cells to the ability of the organism to survive and/or reproduce in different environments.