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A competitive inhibitor is a molecule that binds to the active site of an enzyme, to prevent substrates entering the active site and therefore lowering the rate of reaction. Some drugs act as competitive inhibitors to control reactions in the body, and the body also releases competitive inhibitors as a means of self control.
But remember that the amount of product formed is still remain the same, only the time taken increased.
Wiki User
∙ 11y ago
Wiki User
∙ 9y agoIt slows down or even stop the enzymatic activity because it compete the actove site of the enzymes with substrate and its effect can be reduced by concentrating the concentration of substrate or add more subatrate therefore more substrate are compete with the inibitors
Wiki User
∙ 12y agoCompetitive inhibitors have structures that resemble the enzyme's substrate.
Wiki User
∙ 13y agoactive site
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Inhibitors that decrease an enzymes activity by binding to the active site?
I would just call it an inhibitor. An inhibitor may be a small molecule,such as a metal or it may be a protein.
Is penicillin an competitive inhibitor?
yes it is
What inhibitor has a structure that is so similar to the substrate that it can bond to the enzyme just like the substrate?
Competitive inhibitor. It is termed to be an analogue. It is also known to sometimes act as a "catalytic poison".
What does a repressor do in the enzymes active site?
Repressors bind to the silencers in the DNA to block the RNA polymerase from binding to the promoter of the gene to reduce gene expression, not really binding to enzymes active sites I think what you meant was "what does an inhibitor do to the enzymes active site"? In which case, it depends on the type of inhibitor. A competitive inhibitor has a structure similar to the substrate, hence would bind to the active site as well, competing with the substrate for the enzyme active sites, decreasing enzymatic activity. A non-competitive inhibitor binds to the allosteric site of the enzyme, causing a structural change in the enzyme active site shape. Hence the enzyme would not be able to bind to the original substrate, so enzymatic activity comes to a halt for the enzymes that are bound by the non-competitive inhibitors
What happens to the vmax when a competitive reversible inhibitor is added to an enzyme?
The vmax stays the same as the competitive reversible inhibitor does not affect catalysis in the enzyme-substrate.
Do noncompetitive inhibitors bind to the active site?
A non-competitive inhibitor
Inhibitors that decrease an enzymes activity by binding to the active site?
I would just call it an inhibitor. An inhibitor may be a small molecule,such as a metal or it may be a protein.
What is the name of the reactant that bind to an enzyme's active site?
both substrate and competitive inhibitor
What inhibitor binds into the active site of an enzyme not allowing the subrtate to bind?
This would be a competitive inhibitor. It can be a structural analog of the substrate. This type of inhibition can be out competed by adding more substrate. A competitive inhibitor increases the Km of the enzyme.
How do competitive and noncompetitive inhibitions differ?
A competitive inhibitor often binds to an enzyme's active site. Noncompetitive inhibitors usually bind to a different site on the enzyme.
Is copper sulfate a competitive or noncompetitive inhibitor?
Non-Competitive Inhibitor
What happens the reaction time with a competitive inhibitor?
with a competitive inhibitor the reaction time proceeds slowly.
Is PTU a competitive inhibitor?
non-competitive
Why does adding additional substrate overcome competitive but not noncompetitive inhibition?
A competitive inhibitor competes with the substrate to bind to the active site while a noncompetitive inhibitor binds to an allosteric site of the enzyme (one other than the active site). Thus no amount of substrate can overcome or in a sense interfere with the inhibitors binding to an allosteric site.
Is penicillin an competitive inhibitor?
yes it is
Is penicillin a non-competitive inhibitor?
no
What inhibitor has a structure that is so similar to the substrate that it can bond to the enzyme just like the substrate?
Competitive inhibitor. It is termed to be an analogue. It is also known to sometimes act as a "catalytic poison".
