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.

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.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter5: Photosynthesis

Section: Chapter Questions

Problem 10RQ: Which statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound...

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Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?
Which is NOT an evolutionary adaptation of plants to minimize the costs of photorespiration while also conserving water on hot days? a. Use more ATP to incorporate CO2 into organic compounds, which increases CO2 concentration in the cell. b. Confine the Calvin cycle to specific cells in order to prevent inefficient rubisco binding and net energy loss. c. Binding O2 to rubisco instead of CO2. d. Uptake CO2 only at night and use ATP to fix it into organic acid for later use during the light reactions, which prevents water loss during the day.
How is the difference made up in the Calvin cycle when more ATP is used than NADPH? A. The Calvin cycle occurs half as often as the light-dependent reaction B. The cyclic pathway creates more ATP C. Additional ATP is created from glucose D. Excess NADPH is reused in the light reaction
Describe the regulation of the rubisco enzyme in the calvin cycle and explain the importance of this regulatory step
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.
Explain why a poison that inhibits an enzyme of the Calvin cycle will also inhibit the light reactions.
Which statement about the light reactions of photosynthesis and cellular respiration is correct? a. Both reactions occur in the cell cytoplasm b. plants do not require mitochondria because they produce ATP via photosynthesis c. ATP is produced as a result of the actions of an electron transport chain in both processes d. Light reactions and cellular respiration produce the same waste products e. the final electron acceptor in the light reactions is oxygen
Plants 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 photorespiration
What Is The Main Purpose Of Oxygen In Cellular Respiration? A)Allowing For The Break Down Of Glucose In Pyruvate B)Suppling Electrons To The Electron Transport Chain C)Allowig For A Flow Of Electrons In The Electron Transport Chain D)Oxidation Of Pyruvate To Acetyl COA
In which parts of the Calvin cycle are high energy phosphate groups donated by ATP to boost the energy of reactions? A. formation of G3P and regeneration of RuBP B. regeneration of RuBP and synthesis of PGA C. synthesis of PGA and oxidation of NADPH D. oxidation of NADPH and formation of G3P
Explain why each of the following misconceptions about photosynthesis is false: a. Only plants are autotrophs. b. Plants do not need cellular respiration because they carry out photosynthesis. c. Chlorophyll is the only plant pigment.
Which is not a member of the central pathways? explain why you choice the answer a.glycolysis b.the pentose phosphate pathway c.the calvin cycle d. the tricarboxylic acid cycle