hen 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.

hen 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.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter5: Photosynthesis

Section: Chapter Questions

Problem 11RQ: What is the molecule that leaves the Calvin cycle to be converted into glucose? a. ADP b. G3P c....

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Concept explainers

Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.

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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.

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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
What is the molecule that leaves the Calvin cycle to be converted into glucose? a. ADP b. G3P c. RuBP d. 3-PGA
Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?
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 two products of the light-dependent reactions are used up in the Calvin cycle? Rubisco adds a CO2 molecule to a sugar that contains _______ carbons. The reaction product immediately splits into two sugars that each contain _______ carbons. O2 can compete with CO2 for a place in the rubisco active site. As a consequenceO2 is incorporated into RuBP instead of CO2. Why might this be a disadvantage?
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.
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.
During what stage of the Calvin cycle are hexose sugars formed? stage 4 stage 1 stage 5 stage 2 stage 3
The output of the Calvin cycle is G3P (Glyceraldehyde 3-p). The calvin cycle makes 6 of these , but only one leaves to be used by the plant. What happens to the other 5, and why is this necessary?
Which of the following lists the stages of the Calvin cycle in order, starting with the stage where carbon dioxide is added? PGAL synthesis → carbon fixation → light reactions → regeneration of RuBP carbon fixation → PGAL synthesis → regeneration of RuBP regeneration of RuBP → carbon fixation → PGAL synthesis photorespiration → PGAL synthesis → regeneration of RuBP → carbon fixation
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
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