MYP Biology Exam Topic Photosynthesis Date:

Student Name: Grade:

Criterion C: Knowledge and understanding of scienceAchievement level

Level descriptor

1–2C1 The student recalls some scientific ideas, concepts

C2 The student applies scientific understanding to answer simple question Q1 –Q9 (correct answer)

3–4C3 The student applies scientific understanding to answer multiple questionin familiar situations. Q1 .- Q13 (correct answer)C4 The student applies scientific understanding to answer open questionin familiar situations. Q14 .- Q16 and to answer simple question Q1 –Q16

5–6

C5 The student uses scientific ideas, concepts correctly to give explanations. Q17C6 student applies scientific understanding (Correct answer Q1 -Q22) to answer simple and complex questions including those in unfamiliar situations. (Q18-Q22)

Multiple Choice. Identify the letter of the choice that best completes the statement or answers the question.

1. Which of the following is NOT a part of an ATP molecule?a. Adenineb. Ribosec. Chlorophylld. Phosphate

2. Energy is released from ATP when

a. A phosphate group is added.b. Adenine bonds to ribose.c. Atp is exposed to sunlight.d. A phosphate group is removed.

3. Photosynthesis uses sunlight to convert water and carbon dioxide intoa. Oxygen.b. High-energy sugars.c. Atp and oxygen.d. Oxygen and high-energy sugars.

4. Which of the following are used in the overall reactions for photosynthesis?a. Carbon dioxideb. Waterc. Lightd. All of the above

Ciedi Biology MYP

EJE 1

5. In the overall equation for photosynthesis, six molecules of carbon dioxide result in six molecules of

a. Glucose.b. Water.c. Oxygen.d. Atp.

6. Plants gather the sun’s energy with light-absorbing molecules calleda. Pigments.b. Thylakoids.c. Chloroplasts.d. Glucose.

7. The stroma is the space that surroundsa. Thylakoids.b. Chloroplasts.c. Plant cells.d. All of the above

8. Where do the light-dependent reactions take place?a. In the stromab. Outside the chloroplastsc. In the thylakoid membranesd. Only in chlorophyll molecules

9. Which step is the beginning of photosynthesis?a. Pigments in photosystem I absorb light.b. Pigments in photosystem II absorb light.c. High-energy electrons move through the electron transport chain.d. ATP synthase allows H+ ions to pass through the thylakoid membrane.

10. The Calvin cycle takes place in thea. Stroma.b. Photosystems.c. Thylakoid membranes.d. Chlorophyll molecules.

11. How does the Calvin cycle differ from the light-dependent reactions?a. It takes place in the stroma.b. It takes place in chloroplasts.c. It requires light.d. It takes place in the thylakoid.

13. What is the first identifiable product of carbon dioxide fixation in photosynthesis?a. Ribulose bisphosphate (RuBP) b. Glycerate 3-phosphate (GP)c. Triose phosphate (TP)d. Acetyl CoA

Ciedi Biology MYP

EJE 2

13. The diagram below summaries the light-dependent reactions in photosynthesis. What is occurring at X?

a. ADP + phosphate → ATPb. NADP+→NADPH + H+c. H2O → O2- + 2H+d. NADPH + H+ → NADP+

14. Write the chemical formula for Photosynthesis.

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15. Describe the role of water in the light reactions of photosynthesis.

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16. How is ATP made during photosynthesis?

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EJE 3

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17. Complete the diagram of photosynthesis (light dependent – independent reactions) State the reactants and products of each one.

Ciedi Biology MYP

EJE 4

Unfamiliar situations18. Insectivorous Plants can do photosynthesis and therefore to use carbon dioxide. But they also have to take some of their nutrients from insect’s food. Why?

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Ciedi Biology MYP

EJE 5

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…………………………………………………………………………………Taken from http://d-mac.deviantart.com/art/Man-Eating-Plant-168737798

19. Which of the graphs represents the effect of light intensity on the rate of photosynthesis?

20. If carbon dioxide is removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars?

a. More sugars will be produced.b. Fewer sugars will be produced.c. The same number of sugars will be produced but without carbon dioxide.d. Carbon dioxide does not affect the production of high-energy sugars in plants.

Ciedi Biology MYP

EJE 6

Figure 1

21. Look at Figure 1. All of the following are parts of an ADP molecule EXCEPTa. Structure A.b. Structure B.c. Structure C.d. Structure D.

22. Suppose Priestley repeated his experiment using many kinds of plants besides mint, and that when different plants were placed under the jar, the candle remained lighted for different periods of time. What would be a logical conclusion from these experiments?

a. Different plants require different amounts of water.b. Different plants release different amounts of carbon dioxide.c. Different plants require different amounts of light.d. Different plants release different amounts of oxygen.

¡Enjoy the science!

Ciedi Biology MYP

EJE 7