What catalyzes the rate-limiting step of the Calvin Cycle? a. ribulose phosphate isomerase b. RuBisCO c. phosphoglycerate kinase d. PEP carboxylase
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What catalyzes the rate-limiting step of the Calvin Cycle?
a. ribulose phosphate isomerase
b. RuBisCO
c. phosphoglycerate kinase
d. PEP carboxylase
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- Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?The end product(s) of the light independent reactions (Calvin cycle) of photosynthesis is glyceraldehyde-3-phosphate. Where (if any) can this product enter into catabolic metabolism to make ATP for the cell? Select one: a. the Kreb’s cycle since the end product is pyruvate b. the energy investment stage (step 1) of glycolysis c. the energy payoff stage of glycolysis d. oxidative phosphorylation since the end product(s) are ATP and NADHIf 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?
- At the end of the calvin cycle, this molecule is regenergated: Select one: a. a five carbon molecule, ribulose bis-phosphate b. a six carbon molecule, glucose c. a polymer, cellulose d. a three carbon molecule, glyceraldehyde-3-phosphate e. a four carbon molecule, malateA 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.Describe the Calvin Cycle of Photosynthesis and its function. What are some of the products that can be made from the Calvin cycle? Explain how the enzyme ribulosebisphosphate carboxylase catalyzes a reaction (RuBisCo).
- 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…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.Choose A=if statement 1 and statement 2 are both true; B=if statement 1 is true but statement 2 is false; C=if statement 1 is false but statement 2 is true; D=if statement 1 and statement 2 are both false 1. In beta oxidation, oxidation of the hydroxyl group generates aldehydes 2. Paul Boyer was the first scientist to describe the catalytic mechanism of ATP synthase Select the correct response: C В A
- 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?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 is NOT an example of anabolism? a. the TCA cycle b. glycolosis c. the reverse TCA cycle d. amino acid biosynthesis e. the Calvin cycle