Photosynthesis Review

Photosynthesis review

Short Answer

1. How do heterotrophs obtain energy?

2. What is ATP, and when is energy released from it?

3. Write the overall equation for photosynthesis in both symbols and words.

4. Photosystems I and II are both located in the thylakoid membrane. What advantage does their proximity provide?

5. What does the Calvin cycle do?

6. What is the difference between an autotroph and a heterotroph? Give an example of each type of organism.

7. Explain how heterotrophs get their energy from the sun even though they cannot make their own food.

8. What happens when a phosphate group is removed from an ATP molecule?

Figure 8–2

9. Identify the structures labeled B in Figure 8-2. What is their function?

10. List two factors that affect the rate of photosynthesis.

Essay

11. Discuss the relationship between autotrophs and heterotrophs. Do heterotrophs depend on autotrophs for their survival? Explain your answer.

12. Compare the storage capacity of ATP and glucose. How does the cell use each of these molecules to store energy?

13. Describe how pigments obtain energy from light. Use chlorophyll as an example of the process you describe.

14. Identify three factors that affect the rate of photosynthesis, and explain the effect of each.

15. Trace the events that occur in the thylakoid membrane during the light-dependent reactions.

Other

USING SCIENCE SKILLS
A student prepared two beakers with identical sprigs of a water plant as shown below. She placed one beaker in the shade and the other beaker beside a fluorescent lamp. She then systematically changed the distance of the beaker from the lamp. She counted the bubbles given off by each sprig of the water plant. Shown here is the graph of the data for the beaker she placed in the light.

Figure 8-3

16. Controlling Variables Which beaker is the student’s control beaker, the one in the shade or the one in the light?

17. Applying Concepts Look at Figure 8-3. If the student later tested the air bubbles collected in the test tube, what would she find they are made of? How do you know?

18. Using Tables and Graphs Look at the graph in Figure 8-3. At what distance from the light source was the greatest number of bubbles produced?

19. Analyzing Data Look at the graph in Figure 8-3. What do the student’s data show?

20. Predicting If the lamp was placed closer than 5 centimeters from the water plant, would the plant give off many more bubbles? Why or why not?

USING SCIENCE SKILLS

Figure 8–4

21. Interpreting Graphics What process is shown in Figure 8-4?

22. Interpreting Graphics What structure is shown in Figure 8-4?

23. Interpreting Graphics Look at Figure 8-4. What are the products of the light-dependent reactions?

24. Interpreting Graphics What are the products of the Calvin cycle shown in Figure 8-4?

25. Interpreting Graphics In Figure 8-4, what chemical from the atmosphere is used in the Calvin cycle to produce sugars?