Photosynthesis Review

1. Photosynthesis Review

2. What is Photosynthesis? • Is a process by which green plants and other organisms synthesize their own food using carbon dioxide,water and light.

3. Are organisms that are capable of synthesizing its own food from inorganic substances(carbon dioxide, iron, sulfur) using light. • Some examples are: • Green plants • Algae • certain bacteria

4. Photoautotroph Autotrophs such as plants, bacteria and algae that depend on photosynthesis for both energy and carbon compounds. Chemoautotroph Bacteria that obtain its carbon from photosynthesis and obtains its energy from inorganic substances such as iron, sulfur or other minerals.

5. Chemical Reaction 6CO2  +    6H2O    light   >  C6H12O6    +   6O2 Carbon     Water                        Glucose      Oxygen Dioxide                                         (sugar)                 

7. Chlorophyll a light absorbing pigment that gives plants their green color and converts the energy of sunlight to food in the process known as photosynthesis.

8. Photosynthesis consists of 2 parts: Light reaction and Calvin Cycle • A. True • B. False

9. The Calvin Cycle • The Light Reaction Photosynthesis

10. Calvin Cycle

11. The Calvin Cycle gets ATP and NADPH from the Light Reaction. • A. True • B. False

12. The real product of the Calvin Cycle is PGAL. • A. True • B. False

13. All autotrophs get energy to power cell activities from a. other organisms. b. nonliving sources. c. photoheterotrophs. d. Xrays.

14. We rely on photosynthesis for: a. running our automobiles. b. heating our homes. c. food. d. all of the above.

15. The light reactions of photosynthesis end in a. CO2. b. H2O. c. PSI and PSII. d. NADPH.

16. The compounds ATP and NADPH a. are not particularly stable. b. contain too much carbon. c. are produced by the Calvin cycle. d. attract electrons.

17. Chemoautotrophs obtain energy from a. fungi and bacteria. b. oxidizing inorganic substances. c. carbon dioxide. d. sunlight.

18. During photosynthesis, the oxygen atoms in water molecules a. help form carbohydrates. b. help form both carbohydrates and water. c. end up as oxygen gas. d. act as hydrogen-acceptor molecules.

19. Sugar phosphates are produced in the Calvin cycle. These compounds are used by the plant to make a. lipids. b. amino acids. c. proteins. d. all of the above.

20. Radiant energy is absorbed by chlorophyll. a. occurs during the light reactions b. occurs during the Calvin cycle c. occurs during both phases d. does not occur during either phase

21. Photosynthesis converts ____ into ____. a. sugar, chemical energy and water b. hydrolyzed carbohydrates, usable energy c. sulfur compounds, carbohydrates d. visible light, chemical energy

22. Chlorophyll absorbs light in _____ range(s) of wavelengths. a. the violet/blue and orange/red b. all visible c. the black/white and orange/yellow d. primarily the green

23. Where does the Calvin Cycle occur in the chloroplast? a. thylakoid membrane b. stroma c. grana d. granum

24. ________________ carries water and dissolved minerals from the roots to the leaves. a. Pipes b. Xylem c. Phloem d. Cord

25. __________________ carries the food made in the leaves to the rest of the plant. a. Pipes b. Xylem c. Phloem d. Cord

26. What does RuBP stand for? a. Phosphoslyeric acid b. Ribulose bisphosphate c. Ribo biphosphate d. Ribose bipalladium

27. In the Light Reaction Chlorophyll traps light and splits _______________. a. water b. carbon dioxide c. glucose d. PGAL

28. What is the function of ATP in photosynthesis? a. transports H ions b. compound used to store energy c. compound used to store fats d. transports NADPH

29. What is the function of the stomates in leaves? a. protection b. shape c. light absorption d. diffusion of gases