Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 15.2, Problem 3TQ
Summary Introduction
To review:
The pathway that has sugar phosphate intermediates that are also present in the Calvin cycle and explain the evolution of the two pathways with respect to common sugars.
Introduction:
The Calvin cycle is a mixture of gluconeogenic reactions, where most of the reactions are a non-oxidative branch of the pentose phosphate pathway and several other reactions. In the Calvin cycle, carbon is reduced. The Calvin cycle is a part of the photosynthesis reaction that is totally independent of light.
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Which of the following is not true regarding the Calvin cycle?
A. water is used during the reactions
B. RuBP is regenerated
C. the product of the cycle is G3P
D. glucose is ultimately produced by the reactions
E. ATP is used during the reactions
What is the evolutionary advantage to organisms that the Calvin cycle has a number of reactions in common with other pathways?
. Discuss the similarities and differences between the Calvin cycle and the pentose phosphate pathway.
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Microbiology: An Evolving Science (Fourth Edition)
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- Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?arrow_forwardFor every three molecules of CO2 that are incorporated into carbohydrate during the Calvin cycle there is a net gain of one molecule of _____________.arrow_forwardA decrease in entropy occurs during the CO2 uptake phase of the Calvin cycle, as freely moving CO2 molecules become fixed into a carbon skeleton. How can this occur without direct participation by NADPH and/or ATP?arrow_forward
- There are some similarities and some differences between the citric acid cycle in the mitochondrion and the Calvin cycle in photosynthesis. Which of the following is NOT a true difference between the two cycles? Both involve CO2, but in the Calvin cycle CO2 is used brought into the process as a source of carbon for the sugar being built. In the Mitochondrion, CO2 is removed from the sugar and leaves the cell. In the Calvin cycle, ATP is used to carry chemical energy from the light reactions to the the Calvin cycle where the chemical energy is incorporated in the sugar molecule that is being manufactured. In the mitochondrion, ATP is produced and brought out of the mitochondrion so it can provide chemical energy to the many activities going on in the cytoplasm The first step in the Calvin cycle, the carboxylation of RuBP, produces a 12-carbon product that splits into two 6 carbon pieces. In the first step of the citric acid…arrow_forwardWhich of the following is an incorrect statement about the Calvin cycle? A.The main inputs to the reactions are NADPH, ATP, and CO2. B.The main outputs of the reactions are NADP+ , ADP, and sugar. C.More NADPH is used than ATP during the Calvin cycle. D.Carbon fixation is the first step of the processarrow_forward. Compare and contract the Citric Acid Cycle with the Calvin Cycle: What is the function of each? How does each process work chemically, oxidation verses reduction? How do these processes impact energy flow in the living world?arrow_forward
- Which of the following questions is most relevant to understanding the Calvin cycle? A How does chlorophyll capture light? B How is ATP used in the formation of 3-carbon carbohydrates? C How is NADP+ reduced to NADPH? D How is ATP produced in chemiosmosis?arrow_forwardIn what form or forms is chemical energy added to intermediates in the Calvin Cycle? ATP and NADPH only NADPH calories from glucose only ATParrow_forwardWhy does it take three turns of the Calvin cycle to produce G3P, the initial product of photosynthesis?arrow_forward
- What is the name of the molecule that transports high energy electrons from the light reactions to the Calvin Cycle? ADP NAD ATP NADParrow_forwardWhy is it important to inhibit the Calvin-Benson-Bassham Cycle to have efficient hydrogen productionarrow_forwardThe energy provided by the light reaction is used to fix CO2 during the Calvin cycle. This energy is in the form ofarrow_forward
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