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Ribulose bisphosphate, known as RuBP, is a 5-carbon sugar that is used in the Dark reactions (Calvin cycle) to fix carbon from CO2 (carbon dioxide). The Dark reactions begin when one molecule of CO2 is attached to RuBP.
This is where RuBisCO comes in. Ribulose-1,5-bisphosphate carboxylase/oxygenase is the enzyme that catalyzes the addition of the CO2 molecule to the RuBP. This forms an unstable 6-carbon compound which immediately splits to form two molecules of a 3-carbon compound called 3-phosphoglycerate (3-PGA)
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The joining of carbon dioxide to RuBP occurs in the?
It occurs in the stroma.
What does rubisco do?
adds CO2 to RuBP in the carbon fixation stage in photoresp.
Carbon fixation is catalyzed by what enzyme?
Rubisco
What is the carbon source used in photosynthesis?
Carbon dioxide. In the light-independant reaction of photosynthesis (Calvin cycle) the enzyme RuBisCo catalyzes the carboxylation of RuBP with carbon dioxide, and catalyzes the primary chemcal reaction in which carbon permanently enters the biosphere.
What is the role of rubp in photosynthesis?
RuBP is ribulose biphosphate. It's purpose is in the dark reaction. It is formed by taking a phosphate, coming from the splitting of ATP, and joining it with RuP, changing RuP (ribulose phospate) into RuBP. RuBP is then able to join with CO2 and form an unstable 6C molecule which is the basis for the dark reaction.
Does different enzyme controls photosynthesis?
RuBP There mmight be more but rubp is the enzyme used in the Calvin cycle
The joining of carbon dioxide to RuBP occurs in the?
It occurs in the stroma.
What are the substaites of rubisco?
Two substrates of rubisco when it acts as a carboxylase are that it catalyzes the first reaction and it catalyzes the oxidation of RuBP to phospho-glycolate.
What chemically bonds carbon dioxide to RuBP?
RuBisCo (Ribulose bisphosphate carboxylase)
Where does dark stage of photosynthesis take place?
The dark stage of photosynthesis takes place in stroma. The 1 molecule of glucose is converted into glucose by an enzyme called RUBP or RUBISCO.(RUBP=ribulose biphosphate enzyme , RUBISCO=ribulose biphosphate carboxylase oxygenase)
When carbon dioxide combines with RuBP what happens?
RuBP and CO2 form 2 molecules of G3P (glyserate 3 phosphate) in calvin cycle with aid from the enzyme rubisco.
What does rubisco do?
adds CO2 to RuBP in the carbon fixation stage in photoresp.
What is the first step of the Calvin -benson cycle?
The first step of the Calvin cycle is carbon fixation. RuBisCO (ribulose-1,5-bisphosphate carboxylase oxygenase) is the enzyme that fixates a carbon from carbon dioxide to RuBP (ribulose-1,5-bisiphosphate) to make 3-phosphoglycerate.
What is the definition of a Rubisco?
Rubisco is an important enzyme
Carbon fixation is catalyzed by what enzyme?
Rubisco
What does Carbon dioxide bind to in the Calvin cycle?
Carbon dioxide acts as a source of carbon, it is an inorganic molecule which reactions with RuBP (Ribulose 1,5 bisphosphate) to for an unstable 6 carbon compound which breaks down into 2 molecules of GP (Glycerate 3-phosphate). Note: The reaction of CO2 and RuBP is catalysed by Rubisco (Ribulose 1,5 bisphosphate carboxylase oxygenase) GP in turn is used to synthesize amino acids (with the use of nitrates from the soil) and fatty acids.
What is the carbon source used in photosynthesis?
Carbon dioxide. In the light-independant reaction of photosynthesis (Calvin cycle) the enzyme RuBisCo catalyzes the carboxylation of RuBP with carbon dioxide, and catalyzes the primary chemcal reaction in which carbon permanently enters the biosphere.
