how and where is carbon fixation take place in plant
Answers
Answer:
Carbon fixation or сarbon assimilation is the conversion process of inorganic carbon (carbon dioxide) to organic compounds by living organisms. The most prominent example is photosynthesis, although chemosynthesis is another form of carbon fixation that can take place in the absence of sunlight. Organisms that grow by fixing carbon are called autotrophs. Autotrophs include photoautotrophs, which synthesize organic compounds using the energy of sunlight, and lithoautotrophs, which synthesize organic compounds using the energy of inorganic oxidation. Heterotrophs are organisms that grow using the carbon fixed by autotrophs. The organic compounds are used by heterotrophs to produce energy and to build body structures. "Fixed carbon", "reduced carbon", and "organic carbon" are equivalent terms for various organic compounds
mark as Brainliest answer..... please.....
Answer:
Explanation:
Carbon fixation is a process that involves fixing a carbon into place. Just like you take that piece of paper and tack it to the bulletin board so that it won't float around or end up on the floor, plants want to take carbon dioxide (CO2) out of the air and tack it to carbohydrates so it's not floating around all over the place. The process of taking inorganic carbon (usually CO2) and tacking it to an organic molecule (usually a carbohydrate) is known as carbon fixation.
Carbon fixation
Carbon Fixation fixes inorganic carbon to organic molecules
The Calvin Cycle
This process of carbon fixation is actually the first step in the Calvin Cycle, also known as the Carbon Fixation Cycle or C3 cycle.
The first thing the cell needs is a molecule called ribulose-1,5-bisphosphate or RuBP for short.
The next thing the cell needs is a special enzyme. Enzymes are proteins that speed up chemical reactions. The enzyme the cell needs for carbon fixation is called ribulose-1,5-bisphosphate carboxylase. Ribulose-1,5-bisphosphate carboxylase is quite a mouthful so it's often shortened to RuBisCO.
RuBisCO is an enzyme.
Ribulose-1,5-bisphosphate carboxylase (RuBisCO) is an enzyme
RuBisCO is responsible for fixing the carbon, rather like you are responsible for tacking the paper onto the bulletin board. However, this enzyme works so slowly (in cellular terms) that plants need a whole lot of it in order to fix enough carbon for its needs. Because plants contain so much of this enzyme, it could be in the Guinness Book of World Records as Earth's Most Abundant Enzyme!
With RuBP, CO2 and RuBisCO, the plant cell is ready to fix carbon. RuBisCO takes the CO2 and adds it to the RuBP, creating a temporary intermediate molecule.
RuBisCO takes RuBP and CO2 and forms an intermediate.
Carbon fixation: RuBP and CO2 are temporarily joined as one.
After the intermediate is formed, the whole molecule is separated into two 3-carbon molecules (hence, the name C3 cycle) called 3-phosphoglycerate (3PG). An equation for the reaction might look something like this: RuBP + CO2 = 2(3PG).
Carbon fixation forms 2 (3PG) molecules.
Carbon fixation: Structures of RuBP, CO2, intermediate and 3-PG
The 3PG is made into glyceraldehyde 3-phosphate (Ga3-P), which is used by the plant to produce sugar or starch, or to be cycled back to make RuBP, which again allows for carbon fixation.