Photosynthesis

1. Photosynthesis Review Questions

2. Organisms that make their own food are called _____________.

3. Organisms that make their own food are called autotrophs.

4. Organisms that eat autotrophs are called ____________.

5. Organisms that eat autotrophs are called heterotrophs.

6. Organisms that cannot make their own food are called ___________.

7. Organisms that cannot make their own food are called heterotrophs.

8. The activities of the cell are powered by ________ _____.

9. The activities of the cell are powered by chemical fuels.

10. One of the principal chemical compounds that living things use to store energy is _________ __________.

11. One of the principal chemical compounds that living things use to store energy is adenosine triphosphate.

12. What is the difference between ADP and ATP?

13. ADP has only two phosphate groups while ATP has three.

14. How does a cell store and release energy as needed?

15. A cell stores energy by adding a phosphate group to ADP and releases energy by removing a phosphate group from ATP to make ADP

16. How do cells use energy provided by ATP?

17. In active transport processes such as the Na-K pump and in the movement of cell organelles.

18. Why do cells have only a small amount of ATP?

19. ATP doesn’t store a large amount of energy.

20. Roughly, how much more energy does one molecule of glucose have than one molecule of ATP?

21. 90 times

22. This is the process that plants use energy from the sun to convert water and carbon dioxide into oxygen and carbohydrates.

23. photosynthesis

24. What scientist performed experiments in the 1600’s in order to determine where a trees’ mass came from?

25. Jan van Helmont

26. What scientist discovered that plants produced oxygen?

27. Joseph Priestley

28. Jan Ingenhousz proved that photosynthesis required _____.

29. Jan Ingenhousz proved that photosynthesis required light.

30. Plants gather the sun’s energy with light absorbing molecules called ________.

31. Plants gather the sun’s energy with light absorbing molecules called pigments.

32. The plants’ principal pigment is called ___________.

33. The plants’ principal pigment is called chlorophyll.

34. Why are plants green?

35. The chlorophyll in plants does not absorb light well in the green region of the spectrum. The green wavelengths are reflected.

36. How well would a plant grow under the presence of yellow light?

37. It wouldn’t grow very well at all. Chlorophyll a and b need to absorb light in the blue and red part of the visible spectrum respectively.

38. Inside of the chloroplasts are saclike photosynthetic membranes called _________.

39. Inside of the chloroplasts are saclike photosynthetic membranes called thylakoids.

40. Stacks of thylakoids are called _____.

41. Stacks of thylakoids are called grana.

42. Into what two stages do scientists divide photosynthesis?

43. Light dependent and light independent reactions

44. Where do light dependent reactions take place?

45. In the thylakoid membranes which are in the chloroplasts.

46. Where does the Calvin cycle, or the light independent reactions, take place?

47. In the stroma, the region outside of the thylakoid membrane.

48. Cells use ________ ________ to transfer high energy electrons from chlorophyll to other molecules.

49. Cells use electron carriersto transfer high energy electrons from chlorophyll to other molecules.

50. A _______ ________ is a compound that can accept a pair of high energy electrons and transfer them to another molecule.