AP BIOLOGY Photosynthesis Worksheet

AP BIOLOGY Photosynthesis Worksheet 1. What is the overall reaction for photosynthesis? 6 CO2 + 6 H2O  glucose (C6H12O6) + 6 O2 2. How does this compare to the overall reaction for cellular respiration? It is the reverse of the overall reaction for cellular respiration. 3. Where does the energy for photosynthesis come from? from sunlight 4. What plant pigments are involved in photosynthesis? chlorophyll a, chlorophyll b, and carotenoids 5. Explain why chlorophyll appears green to us in terms of what happens to different wavelengths of light that strike a chlorophyll molecule. We see light that bounces off of objects (reflected light). Chlorophyll is best at trapping and absorbing the red – orange wavelengths of light and the blue, indigo, and violet wavelengths of light. It is not good at absorbing the green wavelengths. The green light is reflected, so it is the part we see. Therefore, chlorophyll looks green to us. 6. How does the amount of energy in light change as the wavelength increases? As wavelength increases, amount of energy decreases. Thus, violet light (which has a shorter wavelength) has