BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 8, Problem 4U
During noncyclic photosynthesis, photosystem I functions to ___________, and photosystem II functions to ______________.
a. synthesize ATP; produce O2
b. reduce NADP+; oxidize H2O
c. reduce CO2; oxidize NADPH
d. restore an electron to its reaction center; gain an electron from water
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Students have asked these similar questions
Carbon dioxide is required for which of the following processes in photosynthesis?
a) the Calvin cycle
b) the splitting of water
c) the absorption of water
d) the production of ATP
e) the light reaction
When oxygen gas is released as a result of photosynthesis, it is a direct byproduct of what process?
a. splitting of water molecules
b. the electron transfer system in the photosystems
c. chemiosmosis
d. reducing of NADP+
The role of photosystem 1 and photosystem 2 in the process of photosynthesis is to
a. absorb sunlight and distribute the energy as heat
b. absorb sunlight and transfer the energy to electrons
c. form ATP as hydrogen ions cross the thylakoid membrane
d. transfer electrons to form NADPH
Chapter 8 Solutions
BIOLOGY
Ch. 8.1 - Prob. 1LOCh. 8.1 - Prob. 2LOCh. 8.2 - Prob. 1LOCh. 8.2 - Differentiate between the light-dependent and...Ch. 8.3 - Discuss how pigments are important to...Ch. 8.3 - Prob. 2LOCh. 8.4 - Prob. 1LOCh. 8.4 - Prob. 2LOCh. 8.5 - Prob. 1LOCh. 8.5 - Prob. 2LO
Ch. 8.6 - Describe carbon fixation.Ch. 8.6 - Prob. 2LOCh. 8.7 - Prob. 1LOCh. 8.7 - Prob. 2LOCh. 8 - Prob. 1DACh. 8 - Prob. 2DACh. 8 - Prob. 3DACh. 8 - The light-dependent reactions of photosynthesis...Ch. 8 - Which region of a chloroplast is associated with...Ch. 8 - The colors of light that are most effective for...Ch. 8 - During noncyclic photosynthesis, photosystem I...Ch. 8 - How is a reaction center pigment in a photosystem...Ch. 8 - The ATP and NADPH from the light reactions are...Ch. 8 - The carbon fixation reaction converts a. inorganic...Ch. 8 - Prob. 8UCh. 8 - Prob. 1ACh. 8 - If you could measure pH within a chloroplast,...Ch. 8 - Prob. 3ACh. 8 - If the Calvin cycle runs through six turns a. all...Ch. 8 - Prob. 5ACh. 8 - Given that the C4 pathway gets around the problems...Ch. 8 - If the thylakoid membrane became leaky to ions,...Ch. 8 - The overall process of photosynthesis a. results...Ch. 8 - Compare and contrast the fixation of carbon in C3,...Ch. 8 - Diagram the relationship between the reactants and...Ch. 8 - Do plant cells need mitochondria? Explain your...
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- In ________, electrons that have been energized by light contribute their energy to add phosphate to ADP, producing ATP. (a) crassulacean acid metabolism (b) the Calvin cycle (c) photorespiration (d) C4 pathways (e) photophosphorylationarrow_forwardThe Calvin-Benson cycle starts with _______. a. the absorption of photon energy b. carbon fixation c. the release of electrons from photosystem II d. NADP+ formationarrow_forwardWhat is the energy of a photon first used to do in photosynthesis? a. split a water molecule b. energize an electron c. produce ATP d. synthesize glucosearrow_forward
- Explain the reciprocal nature of the net chemical reactions for photosynthesis and respiration.arrow_forwardWhat is the difference between the cyclic and noncyclic pathways of photosynthesis? a The cyclic pathway uses electron transport. b The cyclic pathway is light-dependent. c The noncyclic pathway produces NAPDH. d The noncyclic pathway produces ATP.arrow_forwardHow are the NADPH and G3P molecules made during photosynthesis similar? a. They are both end products of photosynthesis. b. They are both substrates for photosynthesis. c. They are both produced from carbon dioxide. d. They both store energy in chemical bonds.arrow_forward
- Which of the following changes would decrease ATP production in the light-dependent reactions of photosynthesis? a. decreasing the pH of the thylakoid lumen b. decreasing the pH of the chloroplast stroma c. increasing the concentration of NADP+ in the chloroplast stroma d. making the thylakoid membrane freely permeable to protons by adding a proton channel e. two of the above would decrease ATP productionarrow_forwardThe investigator suggested that insufficient amounts of carbon dioxide in the water may have been one of the factors that prevented further increases in the rate of photosynthesis at higher light intensities. Why would inadequate amounts of carbon dioxide affect the rate of photosynthesis? Select one or more: a. Carbon dioxide is needed for the production of sugars in the light reactions of photosynthesis b. Carbon dioxide is needed for the production of sugars in the Calvin Cycle of photosynthesis c. Carbon dioxide is needed for the production of ATP in the Calvin Cycle d. Carbon dioxide is the source of oxygen in photosynthesis e. Carbon dioxide is needed for the production of ATP in the light reactions of photosynthesisarrow_forwardSince carotenoids are part of the _________, their electrons are not passed on when they get excited. A) electron carriers of the photosystem B) electron transport chain C) antenna complex of the photosystem D) reaction center of the photosystemarrow_forward
- Under certain conditions, the thylakoid membrane of the chloroplast may become 'leaky’ allowing ions to freely diffuse across it. A consequence of that is carbon fixation will stop. Why would the Calvin Cycle stop? A. Because oxidation of water by PSII would stop. B. Because reduction of NADP+ to NADPH would stop. C. Because the stroma would contain ADP but no ATP. D. Because levels of G3P in the stroma would increase.arrow_forwardPlants undergo both photosynthesis and cellular respiration. Why don’t plants simply use the ATP pro¬duced in the light reactions of photosynthesis to drive cellular processes? A) The ATP produced during photosynthesis is chemically different from the ATP produced during cellular respiration and cannot be used for anabolic reactions B) ATP cannot be stockpiled so the plants would have no energy during non-daylight hours C) The plants have no way of getting the ATP made during photosynthesis out of the chloroplasts to the rest of the cell D) Plants rely on cellular respiration to remove excess O2 and prevent photorespirationarrow_forwardIn _______________, electrons that have been energized by light contribute their energy to add phosphate to ADP, producing ATP. (a) crassulacean acid metabolism (b) the Calvin cycle (c) photorespiration (d) C4 pathways (e) photophosphorylationarrow_forward
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