What happens during the regeneration stage of the Calvin Cycle? Energy from ATP and electrons from NADPH are used to reduc 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose) The remaining G3P molecules that have not exited the cycle are used to re-form RuBP through a series of chemical reactions, so that the Calvin cycle can continue Oxygen is produced through this process The enzyme Rubisco attaches to CO2 to RuBP, causing the formation of molecules of 3-phosphoglycerate

What happens during the regeneration stage of the Calvin Cycle? Energy from ATP and electrons from NADPH are used to reduc 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose) The remaining G3P molecules that have not exited the cycle are used to re-form RuBP through a series of chemical reactions, so that the Calvin cycle can continue Oxygen is produced through this process The enzyme Rubisco attaches to CO2 to RuBP, causing the formation of molecules of 3-phosphoglycerate

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 18P: The Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy...

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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
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+
What is the molecule that leaves the Calvin cycle to be converted into glucose? a. ADP b. G3P c. RuBP d. 3-PGA
What happens during the carbon fixation stage of the Calvin Cycle (light-indepedent reactions)? Energy from ATP and electrons from NADPH are used to reduce 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose) Oxygen is produced through this process The remaining G3P molecules that have exited the cycle are used to re-form RuBP through a series of chemical reactions, so that the Calvin cycle can continue. The enzyme Rubisco attaches to RuBP, causing the formation of molecules of 3-phosphoglycerate
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.
Which of the following correctly sequences the steps of non-cyclic electron transport? * Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions The ATP and NADPH generated by the reactions of photosystem Il and photosystem I are utilized by the Calvin Cycle to build high energy glucose molecules Electrons donated from water molecules pass through photosystem I then O photosystem II before returning to the chlorophyll molecules, generating ATP in the process Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules ) This is a required question
The primary role of the Calvin cycle in photosynthesis is to: - split H2O and release oxygen - establish a proton gradient across the thylakoid membrane - use the energy in ATP and NADPH to fix carbon and build sugars - produce ATP and NADPH 2. The enzyme used to catalyze the initial fixation of CO2 in C3 photosynthesis is: Rubisco NADP+ reductase ATP synthase PEP carboxylase 3. The primary role of the light reactions in photosynthesis is to: - bring CO2 into the chloroplast use the energy in ATP and NADPH to fix carbon and build sugars establish a proton gradient across the thylakoid membrane produce ATP and NADPH *I do not need an explanation so please don't provide, I just need an answer choice picked for each*
Which high energy molecules are needed to power the reactions of the Calvin- Benson cycle? OATP + WATER CO2 + WATER OATP+ NADPH O NADPH + 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.
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
During the light dependent reactions of photosynthesis, the solar energy absorbed by the chlorophyll in the photosystems is used to do what two things? pull H+ ion into a gradient in the thylakoids break apart water to replace electron in the photosystem II energize ATP synthase to make ATP for the Calvin-Benson cycle move electrons down the transport chain to NADP+ to form NADPH excite electrons to leave the chlorophyll molecules
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.