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Bio

QuestionAnswer
1. During the light-dependent reactions of photosynthesis, which event must occur for ATP synthase to function properly Answer: Hydrogren ions must pass through a channel within ATP synthase.
2. Which of the following are used in the overall reactions for photosynthesis?
Answer: All of the above (carbon dioxide, water, and light).
3. The Calvin cycle takes place in the Answer: Stroma.
4. What describes the conversion of ADP to ATP? Answer: An input of energy to attach a third phosphate group.
5. What BEST describes the role of light in the overall process of photosynthesis? Answer: Light provides the energy for assembling small molecules into sugars.
6. Which example should be included in changes to matter and energy during photosynthesis? Answer: Changes that convert light energy into chemical energy stored in carbohydrates.
7. Which property of NADP⁺ allows it to act as an electron carrier? Answer: Its ability to accept and release high-energy electrons and a hydrogen ion.
8. What process is represented by the arrow from water splitting to NADP⁺? Answer: The movement of electrons along the electron transport chain.
9. What is a product of the Calvin cycle? Answer: High-energy sugars.
10. Plants gather the sun’s energy with light-absorbing molecules called Answer: Pigments.
11. Gas exchange occurs through these tiny pores in a leaf. Answer: Stomata.
12. Where do the light-dependent reactions take place? Answer: In the thylakoid membranes.
13. What energy source drives the change from PGA to G3P in the Calvin cycle? Answer: ATP and NADPH.
14. The light-collecting units of a chloroplast are the Answer: Photosystems.
15. Energy is released from ATP when Answer: A phosphate group is removed.
16. This layer of a leaf holds most of the photosynthetic cells. Answer: Mesophyll.
17. Which is the role of the electron transport chain in photosynthesis? Answer: Carrying electrons from photosystem II to photosystem I, to NADP⁺.
18. What are the products of the light-dependent reactions? Answer: Oxygen gas, ATP, and NADPH.
19. Most plants appear green because chlorophyll Answer: Does not absorb green light.
20. If carbon dioxide is removed, what happens to sugar production? Answer: No sugars will be produced.
21. Which labels are the reactants of photosynthesis? Answer: H₂O and CO₂.
22. Which label best communicates the role of light in photosynthesis? Answer: Light is the energy source for convertingaq ADP to ATP, and NADP⁺ to NADPH.
23. How should NADPH and ATP be described in the light-independent reactions?z Answer: Supplying the energy necessary to assemble sugar molecules.
24. All of the following are parts of an ADP molecule EXCEPT Answer: Structure D.
25. Between which parts must bonds be broken to form ADP? Answer: C and D.
26. Which structures make up an ATP molecule? Answer: A, B, C, and D.
27. What does Rubisco do? Answer: Carbon fixation.
28. What best describes the roles of photosystem I and II? Answer: They absorb sunlight and transfer the energy to electrons.
29. The stroma is the space that surrounds Answer: Thylakoids.
30. How should the model show carbon compounds entering and exiting the cycle? Answer: Enter as carbon dioxide, exit as 3-carbon molecules.
31. By analyzing this equation, which property of photosynthesis can be identified? C. The source of carbon atoms in the carbohydrate product.
The equation shows that the carbon in glucose comes from carbon dioxide (CO₂). 32. Photosynthesis uses sunlight to convert water and carbon dioxide into what? D. Oxygen and high-energy sugars.
Plants use light energy to make glucose and release oxygen. 33. How does CO₂ enter into the plant? A. Through the stomata.
Carbon dioxide enters through small openings in the leaves called stomata. 34. Which of the following is an autotroph? D. Tree.
A tree makes its own food through photosynthesis. 35. Which step is the beginning of photosynthesis? B. Pigments in photosystem II absorb light.
Photosynthesis starts when pigments in Photosystem II absorb light energy. 36. Organisms, such as plants, that make their own food are called what? A. Autotrophs.
Autotrophs make their own food using sunlight. 37. Which statements are true about this image? (choose all that apply) B. It occurs in the stroma of a chloroplast. C. It makes sugars. D. It is called the Calvin cycle.
The image shows the Calvin cycle, which happens in the stroma and produces sugars. 38. What is made in the light reactions? A. ATP B. NADPH E. O₂
The light reactions produce ATP and NADPH and release oxygen. 39. What is produced in the Calvin cycle? (choose all that apply) D. NADP⁺ E. ADP
The Calvin cycle returns NADP⁺ and ADP to the light reactions. 40. What is made in the Calvin cycle? B. G3P.
The Calvin cycle produces G3P, which is used to build glucose. 41. What are the three stages of the Calvin cycle? (choose all that apply) A. Reduction B. CO₂ fixation D. Regeneration
These are the three stages of the Calvin cycle. 42. Which plant species is most likely to use a C4 pathway? Cite data and explain briefly. Plant Species B. At 35°C and high light, Species B shows a larger CO2 decrease (-135 ppm) than Species A (-66 ppm). This suggests Species B uses the C4 pathway, which helps plants photosynthesize more efficiently in hot conditions.
Created by: user-2030079
 

 



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