Which of the following scenarios does not occur during the reduction phase of the Calvin Cycle? Hide answer choices Each molecule of 3-phosphoglycerate is phosphorylated by ATP to form 1,3-bisphosphoglycerate. Each molecule of 1,3-bisphosphoglycerate is reduced to glyceraldehyde 3-phosphate by the addition of two electrons from NADPH. Glyceraldehyde 3-phosphate is converted into Ribulose bisphosphate. Some of the glyceraldehyde 3-phosphate molecules are used in carbohydrate production.

Which of the following scenarios does not occur during the reduction phase of the Calvin Cycle? Hide answer choices Each molecule of 3-phosphoglycerate is phosphorylated by ATP to form 1,3-bisphosphoglycerate. Each molecule of 1,3-bisphosphoglycerate is reduced to glyceraldehyde 3-phosphate by the addition of two electrons from NADPH. Glyceraldehyde 3-phosphate is converted into Ribulose bisphosphate. Some of the glyceraldehyde 3-phosphate molecules are used in carbohydrate production.

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter21: Photosynthesis

Section: Chapter Questions

Problem 5P: The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If...

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The Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy change (G) for noncyclic photosynthetic electron transport? 4 (700-nm photons) + 4 (680-nm photons) + 2 H2O + 2 NADP+O2 + 2 NADPH + 2H+
Correctly identify the process, product, or requirement at each indicated step in the Calvin cycle diagram. Drag the appropriate labels to their respective targets. Reducing power input Removal of 6 C for biosynthesis Various sugar rearrangements Regeneration of CO₂ acceptor and energy input Carboxylation Energy input 6 CÔ, 6 ATP 6 Ribulose 1,5-bisphosphate (30 carbons) RubisCO 6 Ribulose Phosphoribulokinase 123-Phospho- glycerate (36 carbons) 5-phosphate (30 carbons) 10 Glyceraldehyde 3-phosphate (30 carbons) Overall stoichiometry: 6 CO₂ + 12 NADPH + 18 ATP- +12 NADP+ + 18 ADP + 17 P 12 ATP 121,3-Bisphospho- glycerate (36 carbons) 12 NAD(P)H 12 Glyceraldehyde 3-phosphate (36 carbons) Fructose 6-phosphate (6 carbons) To biosynthesis Reset Help C₂H₁₂O(PO₂H₂)
Photorespiration is a multienzyme bypass of the Calvin cycle's CO2 fixation process in plants and all other oxygenic phototrophs. This bypass removes and recycles 2-phosphoglycolate, a damaging by- product of photosynthesis in the presence of 02, which is formed when 02 substitutes CO2 in the CO2 fixation pathway. Discuss the situation of fixing 02 (oxygen) rather than CO2 (carbon dioxide) in plants.
Calculate the energy cost of the Calvin cycle combined with glycolysis and oxidative phosphorylation, that is, the ratio of the energy spent synthesizing starch from CO2 and photosynthetically produced NADPH and ATP to the energy generated by the complete oxidation of starch. Assume that each NADPH is energetically equivalent to 2.5 ATP and that starch biosynthesis and breakdown are mechanistically identical to glycogen synthesis and break down.
Consider 41 NADH and 19 FADH2 molecules funneling electrons into the electron transport chain coupled to oxldative phosphorylation 1. The total number of protons (H") pumped during the oxidation of 41 NADH molecules is 2. The total number of protons (H) pumped during the oxidation of 19 FADH, molecules is 3. The number of ATP molecules produced from the oxidation of 41 NADH molecules is 4. The number of ATP molecules produced from the oxidation of 19 FADH, molecules is 5. The net ATP yield from the oxidation of 41 NADH and 19 FADH, molecules is
true or false During the carboxylation phase of the Calvin cycle, CO2 combines with ribulose 1,5 - bisphosphate and the final product of the Calvin cycle is G3P. Plastoquinone is involved in the electron chain transport system in the mitochondria In eukaryotic cell particularly in the nucleus, one CAN NOT find microtubules
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Pyruvate oxidation yields carbon dioxide and water and liberates energy at the rate of 1142.2 kJ/mol. If electron transport also occurs, approximately 12.5 ATP molecules are produced. The free energy of hydrolysis for ATP is −30.5 kJ/mol. What is the apparent efficiency of ATP production?
Which of the following statements related to the Calvin Cycle is CORRECT? Six molecules of G3P are produced for every three carbon dioxide that undergo calvin cycle Carbon dioxide is attached to 3-phosphoglycerate resulting is 2 RuBP The regeneration of RuBP is important because it is directly used for the production of starch, cellulose, and glucose. One molecule of G3P exits the calvin cycle and five is used to form glucose for the production of starch, cellulose, and sucrose.
A culture of the single celled organism Chlamydomonas is actively carrying out photosynthesis in the presence of light and CO2. If you turned off the light, how would you expect the amounts of ribulose 1,5-bisphosphate and 3-phosphoglycerate to change over the next minute? How about if you left the light on and removed the CO2? Please answer these questions with specific references to the Calvin cycle.
In the Calvin cycle, what is the name of the enzyme that attaches a molecule of carbon dioxide to the 5-carbon molecule called ribulose bisphosphate? Glyceraldehyde 3-phosphate Ribulose bisphosphate oxygenase Ribulose bisphosphate carboxylase, also known as RuBisCO 3-PGA carboxylase
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