Where do enzymes bind?
Which blocks enzyme activity by binding to the site of an enzyme an competitive inhibitor or an noncompetitive inhibitor?
If there are less enzymes, the substrate molecules have less active sites to bind to, therefore the amount of enzymes is the limiting factor of the overall enzyme activity. If this was represented in a graph, there would be a positive correlation until all of the enzymes have been used so it would level off.
Enzymes act as natural catalys, they bind to substrates to make an enzyme substrate complex and can then break down the substrate, or cause substrates to bind to each other ( it all depends on what enzyme it is) essentialy they speed up reactions so that they can happen quickly enough to sustain life, this is often a 1000 fold increse in the speed of the reaction.
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…
Different Enzymes inhibit in different ways. Some are structural analogue of substrate and they compete the substrate in binding to the enzyme. Some inhibitors bind in the active site and prevent the binding of the enzyme. Some enzymes doesn't bind the active site but they change the active site properties that prevent the efficient binding of the substrate. some time substrate in large quantity may inhibit the enzyme, while other times the product formed may…
There are several enzymes that 'unzip' DNA. These enzymes are collectively known as DNA helicases. DNA helicases are helix-destabilizing enzymes that bind to DNA at the origin of replication and break hydrogen bonds, thereby separating the two strands. This allows RNA polymerase to begin transcription (copying) of the DNA sequence.
Functionally, enzymes do not increase the amount of energy. Enzymes bind non-covalently with specific molecules called substrates and decrease the free energy required for the substrate to transform into the product. The free energy change of an enzyme catalyzed reaction is lesser than that if the reaction were to proceed by other means
Yes - without enzymes molecules can still bind together - but the process will usually take much longer. Enzymes are catalysts - which means that they lower the activation energy for reactions. This means that reactions occur more quickly. However, enzymes cannot make reactions occur which would not (eventually) occur without the enzyme present.
The enzymes are so specific to their action because they have substrate binding site which has three dimensional configuration which binds to the complementarity three dimensional substrate molecule and hence the enzymes are specific in binding the site and their action In case if the structural configuration of the enzyme changes the substrate is unable to bind at that site and the reaction does not take place