Photosynthesis and Cellular Respiration Twenty Questions Photosynthesis and Cellular Respiration

Twenty Questions: Photosynthesis and Respiration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

1. Describe all of the characteristics of autotrophs. Autotrophs are self-feeders. They are also known as producers. They use the process of photosynthesis to convert sunlight into usable energy called glucose. Energy is released from the glucose in the form of ATP through cellular respiration.

2. What is the equation for cellular respiration? C6H12O6 6 + 6O2  CO2 + 6H2O + ATP

3. In the photosynthesis and respiration simulation lab, which test tube illustrated that plants use cellular respiration? When the plant was in the test tube in the dark. The bromothymal blue turned from blue to yellow in the presence of carbon dioxide.

4. An aquatic snail is placed in a test tube with bromothymal blue and water. Predict the color of the water after 24 hours. Due to cellular respiration, the bromothymal blue will turn from blue to yellow because of the carbon dioxide produced.

5. Why is ATP considered a form of chemical energy? Energy is stored between the phosphate groups. When a phosphate group is removed, energy is released. ATP  ADP

6. What are the three parts of an ATP molecule? Adenine, ribose, and three phosphate groups

7. What is the stroma and what part of photosynthesis takes place there? The stroma is the thick fluid surrounding the thylakoid membrane. The stroma is the site of the light independent/Calvin Cycle.

8. Where is chlorophyll found? Chlorophyll is found inside of the thylakoid membranes.

9. What are three factors that effect the rate of photosynthesis 9. What are three factors that effect the rate of photosynthesis? How do each affect photosynthesis? Light intensity: the higher the light intensity, the higher the rate of photosynthesis. Light color: When the light is colorless, the rate of the photosynthesis is the highest. When the light is green, the rate of photosynthesis is the lowest. CO2 levels: When the levels are high, the rate of photosynthesis is also high.

10. What do you need for photosynthesis to occur? The reactants are sunlight, carbon dioxide, and water.

11. During the photosynthesis simulation, how did we measure the rate of photosynthesis? We measured the rate of photosynthesis through the number of oxygen bubbles produced by the plant because oxygen is a product of photosynthesis.

12. In the Photosynthesis and Respiration Lab, which test tube determined that plants photosynthesize? The test tube that determined whether or not photosynthesis occurred was the test tube with the Elodea in the light.

13. What is the relationship between photosynthesis and respiration? The reactants of photosynthesis are the products of respiration. The reactants of respiration are the products of photosynthesis.

14. What are the reactants and products of respiration? The reactants are glucose and oxygen. The products are carbon dioxide, water, and ATP.

15. In the photosynthesis and respiration simulation, what would happen if you added five more plants to the test tube and put them in the dark? If there were five more plants, more carbon dioxide will be produced resulting in a deeper yellow color.

16. Is ATP reusable? ATP is reusable because the phosphate group that is removed and replaced in the ATP Cycle (ATP  ADP  ATP).

17. Describe all of the characteristics of heterotrophs. Heterotrophs are other-eaters. They are also known as consumers. Energy is released from the glucose in the form of ATP through cellular respiration.

18. What do you think would happen if there was less carbon dioxide? If there was less carbon dioxide available to the plant, the rate of photosynthesis would decrease.

19. What wavelengths do chlorophyll absorb? They absorb every wavelength except green in the visible light portion of the EM Spectrum (a little DES for you!).

20. In an ATP molecule, where is energy stored? Potential energy is stored between the phosphate groups.