Examples of fixation in the following topics:
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- Nitrogen fixation also refers to other biological conversions of nitrogen, such as its conversion to nitrogen dioxide.
- Nitrogen fixation is a process by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).
- Fixation processes free up the nitrogen atoms from their diatomic form (N2) to be used in other ways.
- Therefore, nitrogen fixation is essential for agriculture and the manufacture of fertilizer.
- Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by an enzyme called nitrogenase.
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- Nitrogen fixation carried out by bacteria helps farmers yield healthy crops.
- He found that the nodules on the roots of legumes are the location where nitrogen fixation takes place.
- Hellriegel did not determine what factors in the root nodules carried out nitrogen fixation.
- These rhizobia perform the chemical processes of nitrogen fixation.
- Work done by Martinus Beijerinck was key to the discovery of rhizobia, symbiotic bacteria found on the roots of legumes and responsible for nitrogen fixation.
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- Through control of gene expression, nitrogen fixing bacteria can turn on and off the proteins needed for nitrogen fixation.
- The fixation of atmospheric nitrogen (N2) is a very energy intensive endeavor.
- If there is no need for N2 fixation, the production of proteins needed for fixation are tightly controlled.
- The nif genes are genes encoding enzymes involved in the fixation of atmospheric nitrogen.
- Discuss the role of the nif genes in controlling nitrogen fixation
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- Complement fixation is a method that demonstrates antibody presence in patient serum.
- Complement fixation is a classic method for demonstrating the presence of antibody in patient serum.
- The complement fixation test consists of two components.
- These two components of the complement fixation method are tested in sequence.
- Describe how the complement fixation assay can be used to test for the presence of a specific antibody in a patient's serum
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- Abiotic nitrogen fixation occurs as a result of lightning or by industrial processes.
- Biological nitrogen fixation (BNF) is exclusively carried out by prokaryotes: soil bacteria, cyanobacteria, and Frankia spp.
- Nitrogenase, the enzyme that fixes nitrogen, is inactivated by oxygen, so the nodule provides an oxygen-free area for nitrogen fixation to take place.
- Through symbiotic nitrogen fixation, the plant benefits from using an endless source of nitrogen: the atmosphere.
- Explain the need for nitrogen fixation and how it is accomplished
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- Biological nitrogen fixation (BNF), the conversion of atmospheric nitrogen (N2) into ammonia (NH3), is exclusively carried out by prokaryotes, such as soil bacteria or cyanobacteria.
- The NH3 resulting from fixation can be transported into plant tissue and incorporated into amino acids, which are then made into plant proteins.
- Soil bacteria, collectively called rhizobia, symbiotically interact with legume roots to form specialized structures called nodules in which nitrogen fixation takes place .
- Through symbiotic nitrogen fixation, the plant benefits from using an endless source of nitrogen from the atmosphere.
- Abiotic nitrogen fixation has been omitted.
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- Carboxysomes are intracellular structures that contain enzymes involved in carbon fixation and found in many autotrophic bacteria.
- They are proteinaceous structures resembling phage heads in their morphology; they contain the enzymes of carbon dioxide fixation in these organisms.
- It is thought that the high local concentration of the enzymes, along with the fast conversion of bicarbonate to carbon dioxide by carbonic anhydrase, allows faster and more efficient carbon dioxide fixation than is possible inside the cytoplasm.
- Carboxysomes are bacterial microcompartments that contain enzymes involved in carbon fixation.
- These compartments are thought to concentrate carbon dioxide to overcome the inefficiency of RuBisCo (ribulose bisphosphate carboxylase/oxygenase) - the predominant enzyme in carbon fixation and the rate limiting enzyme in the Calvin cycle.
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- Some plants such as cacti can prepare materials for photosynthesis during the night by a temporary carbon fixation and storage process, because opening the stomata at this time conserves water due to cooler temperatures.
- In contrast to C4 metabolism, which physically separates the CO2 fixation to PEP from the Calvin cycle, CAM temporally separates these two processes.
- Decarboxylation of malate during the day releases CO2 inside the leaves, thus allowing carbon fixation to 3-phosphoglycerate by RuBisCO.
- Due to the inactivity required by the CAM mechanism, C4 carbon fixation has a greater efficiency in terms of PGA synthesis.
- Over 90% of plants use C3 carbon fixation, compared to 3% that use C4 carbon fixation; however, the evolution of C4 in over 60 plant lineages makes it a striking example of convergent evolution.
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- Oxygenic photosynthesis, provides energy to organism and allows for carbon fixation, all the while producing oxygen as a byproduct.
- Photosynthesis is not only needed by photosynthetic organism for energy but also for carbon fixation .
- Carbon dioxide is converted into sugars in a process called carbon fixation.
- Carbon fixation is a redox reaction, so photosynthesis needs to supply both a source of energy to drive this process, and the electrons needed to convert carbon dioxide into a carbohydrate, which is a reduction reaction.
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- The 3-hydroxypropionate cycle is a carbon fixation pathway that results in the production of acetyl-CoA and glyoxylate.
- Carbon fixation is a key pathway in numerous microorganisms, resulting in the formation of organic compounds deemed necessary for cellular processes.
- One of the pathways that is utilized for carbon fixation is the 3-hydroxypropionate cycle.
- However, the cycle can be broken down into two major phases, carbon dioxide fixation and glyoxylate assimilation.