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.
It 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
Competitive inhibitors have structures that resemble the enzyme's substrate.
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.
yes it is
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
Competitive inhibitor. It is termed to be an analogue. It is also known to sometimes act as a "catalytic poison".
The vmax stays the same as the competitive reversible inhibitor does not affect catalysis in the enzyme-substrate.
A non-competitive inhibitor
I would just call it an inhibitor. An inhibitor may be a small molecule,such as a metal or it may be a protein.
both substrate and competitive inhibitor
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.
A competitive inhibitor often binds to an enzyme's active site. Noncompetitive inhibitors usually bind to a different site on the enzyme.
Copper sulfate is a noncompetitive inhibitor. It binds to the enzyme at a site other than the active site, which results in a change in the enzyme's shape and prevents the substrate from binding effectively.
with a competitive inhibitor the reaction time proceeds slowly.
non-competitive
Adding additional substrate can overcome competitive inhibition because the inhibitor and substrate compete for the active site on the enzyme, so increasing substrate concentration can outcompete the inhibitor. However, in noncompetitive inhibition, the inhibitor binds to a site other than the active site, so adding more substrate cannot overcome this inhibition as the inhibitor is not competing for the same binding site as the substrate.
yes it is
no
Competitive inhibitor. It is termed to be an analogue. It is also known to sometimes act as a "catalytic poison".