Statement 1: In order to produce 1 molecule of glucose, we need 6 molecules of Carbon Dioxide (CO2), 6 molecules of RuBP, 12 NADPH, and 12 ATP. Statement 2: In order to produce 1 G3P and 3 RuBP in the Calvin Cycle, we need 3 molecules of Carbon Dioxide (CO2), 3 molecules of RuBP, 6 NADPH, and 9 ATP. Hide answer choices Statement 1 is true; Statement 2 is false Statement 1 is false; Statement 2 is true Both statements are true Both statements are false

Statement 1: In order to produce 1 molecule of glucose, we need 6 molecules of Carbon Dioxide (CO2), 6 molecules of RuBP, 12 NADPH, and 12 ATP. Statement 2: In order to produce 1 G3P and 3 RuBP in the Calvin Cycle, we need 3 molecules of Carbon Dioxide (CO2), 3 molecules of RuBP, 6 NADPH, and 9 ATP. Hide answer choices Statement 1 is true; Statement 2 is false Statement 1 is false; Statement 2 is true Both statements are true Both statements are false

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter6: Where It Starts-photosynthesis

Section: Chapter Questions

Problem 12SA: Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH...

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Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2
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.
What are the stages of the Calvin-Benson cycle? Select all that apply. The resulting unstable six-carbon molecule splits into two three-carbon molecules of PGA. ATP and NADPH are used to convert PGA molecules to PGAL. Most of the PGAL is used to regenerate RuBP, but some is exported to the cytoplasm to produce carbohydrates. Rubisco attaches CO2 to a five-carbon organic compound called RuBP. Rubisco is used to convert PGA molecules to PGAL.
Which among the following statements is INCORRECT? The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which forms a six-carbon molecule that breaks down into two 3PG molecules. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which is a reaction assisted by large quantities of RuBP carboxylase enzyme. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which decreases cell carbon dioxide levels, which increases the diffusion gradient. The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which immediately becomes a six-carbon sugar that is the base for starch, sucrose, cellulose, etc.
Statement 1: In the Calvin Cycle, two molecules of glyceraldehyde 3-phosphate are produced if two molecules of carbon dioxide are fixed. Statement 2: If the carbon fixation phase of the Calvin Cycle begins with 6 molecules of ribulose bisphosphate and 6 molecules of carbon dioxide, 2 out of 12 molecules of glyceraldehyde 3-phosphate made at the end of the reduction phase are used in carbohydrate production while the remaining 10 molecules are needed to keep the Calvin Cycle turning by regenerating ribulose bisphosphate. Hide answer choices Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true. Both statements are true. Both statements are false
Match the column to the letters Question Answers 1. Third phase of the Calvin Cycle 2. number of molecules of both ATP and NADPH consumed to form 6 molecules of G3P 3. Number of molecules of G3P considered as a net gain of carbohydrate in the cycle 4. Fate of each molecule of 3-phosphoglycerate after receiving an additional phosphate group from ATP 5. # of molecules of RuBP resulting from the rearrangement of five molecules of G3P carbon skeletons in the last steps on the Calvin Cycle 6. Fate of 1,3 -bisphosphoglycerate after being reduced 7. Carbon fixation products 8. # of molecules of 3-PGA that will be reduced to form 6 molecules of G3P 9. RubisCo 10. # of molecules of G3P to be recycled to regenerate three molecules of RuBP a. 6 molecules b. Regeneration of the CO2 acceptor c. six-carbon intermediate that splits in half forming two molecules of 3-phosphoglycerate ( for each C02 fixed) d. Glyceraldehyde 3-phosphate e. enzyme that catalyzes the attachment of CO2 into RuBP…
when three molecules of carbon dioxide (CO2) react with three molecules of RuBP during the Calvin Cycle, six molecules of the sugar G3P are produced. One G3P molecule exits the Calvin cycle during Phase 2. What happens to the other five G3P molecules.
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.
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
In Calvin cycle, the initial incorporation of carbon from CO2 into organic compounds, is indirectly dependent on light to produce sugar because it requires the supply of ATP and NADPH produced by the light reactions. Select one: True False
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 O2, which is formed when 02 substitutes CO2 in the CO2 fixation pathway. According to a regional scale model, photorespiration currently reduces US soybean and wheat yields by 36% and 20%, respectively, and a 5% reduction in photorespiration losses would be worth around $500 million yearly in the United States. Can you forecast the costs and good advantages of C4 photosynthesis? What factors increase the likelihood that the benefits will outweigh the expenses in hot, dry areas in the United States?
Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. A. 1,2 and 3 B. 1 and 3 C. 2 and 4 D. 4 only E. All of 1,2,3 and 4 are correct