BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 8, Problem 5TY
Summary Introduction
Introduction: RuBP is a five-carbon compound that is used in the Calvin cycle to produce glucose. The Calvin cycle is a light-independent reaction that utilizes RuBP as a substrate to generate ATP and NADPH along with carbohydrate, glucose.
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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 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.
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.
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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- Photorespiration is avoided in C4 plants becausea. these plants separate the formation of a four-carbon molecule fromthe rest of the Calvin cycle in different cells.b. these plants carry out only anaerobic respiration.c. the enzyme PEP carboxylase functions to maintain high CO2concentrations in the bundle-sheath cells.d. all of the above.e. a and c onlyarrow_forwardWhich 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 assimilationarrow_forwardIn the photosynthetic formation of ATP, the enzyme ATP synthase couples the synthesis of ATP to: A. the diffusion of protons B. the reduction of NADP+ C. the excitation of chlorophyll D. the reduction of chlorophyll E. CO2 fixationarrow_forward
- RuBisCo 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_forwardIf 30 molecules of CO2 enter the Calvin Cycle,a. How many molecules of phosphoglycerate (PGA) will be produced? b. How many molecules of glyceraldehyde phosphate (PGAL) leave the cycle? c. How many molecules of ribulose bisphosphate (RuBP) will be produced? d. How many molecules of ATP will be utilized?arrow_forwardMark 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_forward
- In the carbon reduction phase of the Calvin cycle, electrons from NADPH are donated to a metabolic intermediate to form G3P molecules. Which statement is NOT true regarding G3P? A. G3P molecules are involved in the regeneration of RuBP. B. G3P molecules affect the activity of the enzyme rubisco. C. G3P molecules have more potential energy than PGA molecules. D. G3P molecules are used to synthesize glucose and other sugars.arrow_forwardWhich of the following are products of the dark (light independent, Calvin cycle) reactions of photosynthesis. A. Glucose B. Water C. ATP D. NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forwardWhich of the following terms regarding the Calvin cycle are mismatched? a.) rubisco and ATP production b.) PGAL and rearranged from glucose c.) carbon fixation and stromaarrow_forward
- Which of the following substances does not participate in the Calvin–Benson cycle? a. ATP d. PGAL b. NADPH e. O2 c. RuBP f. CO2arrow_forwardIn 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 is a stage in the light independent reactions in photosynthesis (Calvin cycle) Group of answer choices a. release of oxygen b. photolysis of water c. photophosphorylation of ADP d. carboxylation of a 5-C sugararrow_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