Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 8, Problem 9TY
Summary Introduction
Introduction: The process of photorespiration occurs when the level of oxygen is higher and the level of carbon dioxide is lower. This process happens under hot and dry conditions. This process utilizes oxygen and liberates out carbon dioxide. Some C4 plants avoid the process of photorespiration via several mechanisms.
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Which of the following descriptions about photorespiration is not correct?
Select one:
a. Rubisco binds O2 instead of CO2.
b. Carbon dioxide is released without producing ATP.
c. It limits damaging products of light reactions that build up in the absence of the Calvin cycle at low CO2 concentrations.
d. Peroxisomes and mitochondria rearrange and split the compound made by rubisco to fix CO2.
e. It occurs in hot and dry conditions.
Which of the following statements is TRUE?
Select one:
a. The immediate product of the light energy absorbed by the P680 reaction center is used to produce NADPH.
b. In cyclic photophosphorylation, the chlorophyll is reduced by electrons liberated from water molecules.
c. The O2 gas produced during photosynthesis is derived from CO2.
d. In noncyclic photophosphorylation, electrons from water are used directly for the reduction of P700.
e. All of the statements are false.
Which of the following is true of chloroplastic ATP:
Select one:
a.
it is made in the Calvin cycle and consumed in the light reactions
b.
it is used during photosynthesis, S assimilation, and N assimilation
c.
it does not leave the chloroplast, and is used to breakdown molecules
d.
it is made during photosynthesis and S assimilation
e.
it leaves the chloroplast, and is consumed in respiration and N assimilation
Chapter 8 Solutions
Biology
Ch. 8.1 - Core Skill: Modeling The goal of this modeling...Ch. 8.1 - Prob. 2CSCh. 8.1 - Can the Calvin cycle occur in the dark?Ch. 8.2 - Prob. 1CCCh. 8.2 - Prob. 2CCCh. 8.2 - Prob. 3CCCh. 8.2 - Prob. 4CCCh. 8.2 - Why does cyclic photophosphorylation provide an...Ch. 8.2 - Prob. 6CCCh. 8.3 - Prob. 1CC
Ch. 8.4 - Prob. 1CCCh. 8.4 - Prob. 1EQCh. 8.4 - Prob. 2EQCh. 8.4 - Prob. 3EQCh. 8.5 - Prob. 1CCCh. 8.5 - Prob. 2CCCh. 8 - The water necessary for photosynthesis a. is split...Ch. 8 - In PSII, P68o differs from the pigment molecules...Ch. 8 - Prob. 3TYCh. 8 - Prob. 4TYCh. 8 - Prob. 5TYCh. 8 - Prob. 6TYCh. 8 - Prob. 7TYCh. 8 - Prob. 8TYCh. 8 - Prob. 9TYCh. 8 - Prob. 10TYCh. 8 - Prob. 1CQCh. 8 - Prob. 2CQCh. 8 - Prob. 3CQCh. 8 - Discuss the advantages and disadvantages of being...Ch. 8 - Biotechnologists are trying to genetically modify...
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- In C3 plants CO2 is first incorporated into __________, whereas in C4 and CAM plants the CO2 is first incorporated into __________, and subsequently put into the Calvin cycle by Rubisco. a. 3-phosphoglycerate; oxaloacetate b. dihydroxyacetone phosphate; malate c. 3-phosphoglycerate; malate d. glyceraldehyde-3- phosphate; erythrose-4-phosphatearrow_forwardWhich 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_forwardWhich of the following statements about the Calvin-Benson cycle is TRUE? Select one: a. Blocking light causes 3PG to accumulate. b. All the statements are false. c. Rubisco catalyzes the formation of RuBP. d. ATP and NADPH + H+ are required to regenerate RuBP. e. More molecules of NADPH than ATP are required per cycle.arrow_forward
- Mark ALL that are true for cyclic photophosphorylation. Select one or more: a. Requires Photosystem II but not Photosystem I. b. Electrons are recycled back to the original photosystem, and therefore water is not required as an electron donor. c. Generates O2 and ATP, but not NADPH. d. Enables electrons to bypass the electron transport chain between the two photosystems. e. It is coupled to proton transport into the stroma.arrow_forwardThe light dependent reactions of photosynthesis are characterized by A. oxidation of carbon dioxide, release of oxygen, synthesis of glucose. B. release of oxygen, fixation of carbon dioxide, hydrolysis of ATP. C. oxidation of water, reduction of NADP+ , hydrolysis of ATP. D. reduction of oxygen, oxidation of NADPH, formation of ATP. E. oxidation of water, reduction of NADP+ , formation of ATP.arrow_forwardRuBisCo is mutated so that it does not function. What would be a possible impact on the Calvin cycle? which options are true a. Less CO2 would be produced. b. Oxidation of NADPH would be decreased. c. G3P production would decrease. d. CO2 would be fixed at an increased rate. e. RuBP would be regenerated at a faster rate.arrow_forward
- Which of the following are correct about C 4 Cycle and C 4 plants? P. Phosphoenolpyruvate carboxylase is located in to thylakoid membrane of chloroplast. Q. Malate or aspartate is transported to the bundle sheath cells. R. Photorespiration is higher in C 4 plants. S. RuBisCo is found in the bundle sheath. Q and S P and Q R and S P, Q and Rarrow_forwardWhich of the following descriptions about photosystems during linear electron flow is not correct? Select one: a. energy required for ATP synthesis is provided when electrons pass through the electron transport chain from photosystem I b. photosystem II works before photosystem I c. P680 is the chlorophyll a pair that exists in photosystemII d. the primary electron acceptor receives electrons from P680 or P700 e. P680+ receives electrons from the splitting of waterarrow_forwardWhich of the following options best explains how less chlorophyll would affect the proces of photosynthesis in plants? 6. A. It would increase the rate of photosynthesis because of the increased production of food. B. It would limit the amount water plants are able to take in, resulting in a slower rate of photosynthesis. C. It would increase the production of oxygen because the plant would need to work hard to feed themselves. С. D. It would limit the amount of light absorbed by the plant and decrease the amount of food the plant is able to produce for itself.arrow_forward
- A. The C4 plant performs photosynthesis more efficiently than the C3 when the CO2 concentration is 600ppm or less. Provide one reason why the rate of photosynthesis doesn’t change for the C4 plant when the CO2 concentration increases above 400 ppm. B. Discuss what is happening in the C3 plant when the CO2 levels are below 50 ppm. Provide one reason why this does NOT happen to the C4 plant.arrow_forwardIf 25% of the photosynthetic electron transport chains in a chloroplast change from non-cyclic to cyclic photophosphorylation, this will: Select one: a. Decrease the rate of production of ATP and NADPH. b. Increase the rate of production of ATP and NADPH. c. Increase ATP production relative to NADPH production. d. Increase NADP production relative to ATP production. e. Increase NADPH production relative to ATP production.arrow_forwardWhich of the following represents a correct sequence in non-cyclic photophosphorylation? a. photosystem I -> ATP production -> photosystem II -> NADPH production b. photosystem II -> ATP production -> photosystem I -> NADPH production c. photosystem I -> NADPH production -> photosystem II -> ATP production d. photosystem II -> NADPH production -> photosystem I -> ATP productionarrow_forward
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Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY