Photosynthesis

Photosynthesis - CH 8 1. During the light reactions of...

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CH 8 1. During the light reactions of photosynthesis, the synthesis of _______ is coupled to the diffusion of protons. Answer: ATP 2. Atmospheric CO 2 enters plant leaves through openings called _______. Answer: stomata 3. In the 1800s, the summarized chemical reaction for photosynthesis was incorrect because it left out _______ as a product. Answer: water 4. In noncyclic photophosphorylation, the electrons for the reduction of chlorophyll in photosystem II come from _______. Answer: water 5. When _______ are exposed to light and CO 2 , four-carbon compounds are the first carbon-containing products. Answer: C 4 plants 6. During the process of _______ , rubisco catalyzes the reaction of RuBP with oxygen. Answer: photorespiration 7. A group of scientists led by _______ conducted experiments demonstrating that RuBP is the CO 2 acceptor in the dark reactions of photosynthesis. Answer: Calvin 8. When researchers shifted isolated chloroplasts from a low pH solution to a more alkaline solution, ATP synthesis occurred, even in the absence of light. This experiment was used to support the _______ mechanism of ATP formation in chloroplasts. Answer: chemiosmotic 9. During cyclic photophosphorylation, the energy of photons is converted to the chemical energy of the product, _______. Answer: ATP 10. In C 3 plants, the Calvin–Benson cycle occurs in the chloroplasts of _______ cells, whereas in C 4 plants the cycle occurs in the _______ cells. Answer: mesophyll; bundle sheath 11. In both photosynthesis and respiration, _______ synthesis is coupled to the diffusion of protons across a membrane. Answer: ATP 12. The dark reactions take place in the (dark/light) _______.
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Answer: light 13. NADP is the abbreviation for _______. Answer: nicotinamide adenine dinucleotide phosphate 14. The Calvin–Benson cycle is sometimes called the _______. Answer: dark reactions 15. The O 2 found in Earth’s atmosphere is generated from the photosystem _______ of noncyclic photophosphorylation. Answer: II 16. During cyclic photophosphorylation, _______ rather than NADP + receives the electron from ferredoxin. Answer: plastoquinone 17. The most abundant enzyme in the biosphere is _______. Answer: rubisco (or RuBP carboxylase) 18. The absorption spectrum of chlorophyll a is (different from/similar to) _______ the action spectrum of chlorophyll a . Answer: similar to 19. The wide range of wavelengths that photons can have is shown by the _______. Answer: electromagnetic spectrum Multiple Choice 1. How do red and blue light differ from one another? a. They differ in intensity. b. They have a different number of photons in each quantum. c. Their wavelengths are different. d. They differ in duration.
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Photosynthesis - CH 8 1. During the light reactions of...

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