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Three things that can alter the rate of an enzyme are; temperature, pH and substrate concentration. Enzymes will have an optimal temperature and pH, at which they will have the greatest rate. Below or above these optimum conditions, the rate will be slower.
This would be an enzyme.
Enzyme
Catalysis Nature of. Reactant Temperature Concentration
Factors that can slow down an enzyme reaction include low substrate concentration, low pH levels, high temperature, or the presence of inhibitors. Conversely, factors that can speed up an enzyme reaction include high substrate concentration, optimal pH levels, optimal temperature, or the presence of activators.
You can add a catalyst, or raise the temperature, or change the pressure, these are some of the things done to speed up a chemical reaction.
Adaptation.
When investigating the rate of an enzyme-controlled reaction, two measurable factors are the amount of product formed over time and the decrease in substrate concentration over time. By monitoring the rate at which product accumulates or substrate is consumed, researchers can determine the enzyme's activity and efficiency under varying conditions. Additionally, factors such as temperature and pH can be varied and measured to assess their impact on the reaction rate.
Living things adjust to a change in their surroundings immediately by a reaction called homeostasis. Claude Bernard, a French physiologist, came up with the idea of homeostasis in 1865.
Enzymes are protiens. If you get the balance of pH or temperature outof wack, you can change the shape of the enzyme. Changing the shape of the said enzyme damages the protein, so it cannot do its job. This is called denaturing.
Both enzymes and receptors have specific sites for the substrates to bind. The receptor causes a response beyond the cell membrane and the enzyme facilitates a chemical change in the substrate. Enzymes can be membrane bound or free floating. Receptors are usually membrane proteins
no, technically there is no such thing as a physical reaction. It is, however, a physical change. when two things react, it is chemical so you cannot have a "Physical" reaction in chemistry