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Can enzyme activity be affected by salinity and inhibitors?
Yes, both salinity and inhibitors can affect enzyme activity. There are two types of inhibitors, non-competitive and competitive inhibitors that will either bind to the allosteric or active site respectively.
Can the presence of inhibitors or activitors affect enzyme activity?
yes, enzymes can be inhibited by other enzymes.
What switchs on enzyme activity while what can switch off or reduce enzyme activity?
activators; inhibitors
What modify's the rate of enzyme activity.?
Several factors affect the rate at which enzymatic reactions proceed - temperature, pH, enzyme concentration, substrate concentration, and the presence of any inhibitors or activator
What does inhibitor do to enzyme activity?
AnswerWhat does inhibitor do to enzyme activity?They prevent the reactions from happening. Non-competative inhibitors alter the shape of the active site so that the substrate no longer fits, and competative inhibitors block the active site.
What type factors affect an enzyme from working?
Inhibitors.
What do activators and inhibitors help regulate?
enzyme activity within the metabolic pathways
Difference between reversible and irreversible inhibitors?
Enzyme inhibitors are molecules that bind to enzymes and decrease their activity. The binding of an inhibitor can stop a substrate from entering the enzyme's active site and/or hinder the enzyme from catalyzing its reaction. Inhibitor binding is either reversible or irreversible. Irreversible inhibitors usually react with the enzyme and change it chemically. These inhibitors modify key amino acid residues needed for enzymatic activity. In contrast, reversible inhibitors bind non-covalently and different types of inhibition are produced depending on whether these inhibitors bind the enzyme, the enzyme-substrate complex, or both.
What can change the way an enzyme acts?
Enzyme activity is affected by other molecules, temperature, chemical environment (e.g., pH), and the concentration of substrate and enzyme. Activators are molecules that encourage enzyme activity, and inhibitors are enzymes that decrease enzyme activity. Sometimes a cofactor is necessary for the enzyme to work.
Why is protein concentration necessary for accurate comparison of the enzyme activity of the fractions?
Enzyme activity sometimes reflects the amount of protein expressed in a cell--however, due to enzyme inhibitors, the enzyme activity is not always reflective of the amount of protein expressed by a cell.
What factors affect the rate of enzyme activity?
-Heat, temperature, &pHtemperature, pH level, concentration of enzyme, concentration of substrate( my sec.1 science book)
What blocks enzyme activity by binding to the active site of an enzyme?
Competitive inhibitors reduce enzyme activity by binding (in competition with the enzyme's substrate) to the active site. These inhibitors may be reversible or irreversible. With reversible inhibitors, which may release the enzyme, concentrations much higher than the concentration of the substrate would be required to completely block enzyme activity, and even then one or two reactions may take place over long periods of time. With irreversible inhibitors, which permanently attach to the enzyme, enzyme activity could be completely blocked when the amount of inhibitor matches the amount of enzyme. Competitive inhibition reduces the enzymes ability to bind substrate (so it lowers the KM) but does not alter the maximum rate (very high substrate concentrations would out compete for enzyme binding).Other types of inhibitors work in other ways. Non-competitive inhibitors bind to the enzyme on a site other than the active site. These too may be reversible or irreversible. Binding does not compete with substrate, so concentrations to completely block enzyme activity do not have to be as high as reversible competitive inhibitors. Non-competitive inhibition reduces the apparent maximum rate for the enzyme.Uncompetitive inhibitors bind only when the substrate is also bound to the enzyme (they bind to the enzyme-substrate complex). Both the maximum rate and substrate binding affinities appear lower.
