Biology
- Enzyme Inhibition
In competitive inhibition, inhibitor has a shape, charge, size and structure similar to that of the substrate. It therefore competes with the substrate for the active sites to form the enzyme-inhibitor complex (E-I complex) and reduces the number of active...
- Q: Distinguish Between Competitive And Non-competitive Inhibition Of Enzymes
A competitive inhibitor is structurally similar to the substrate but a non-competitive inhibitor is often structurally different from the substrate. Hence, a competitive inhibitor will compete with the substrate for an active site but a non competitive...
- #20.factors Affecting The Rate Of Enzyme-catalysed Reactions
These factors are: - Temperature - pH - Enzyme concentration - Substrate concentration - Inhibitor concentration When an enzyme solution is added to a solution of its substrate, the molecules collide. With time, the quantity of substrate...
- #18. Enzymes - Active Site, Activation Energy, Enzyme Specificity
Enzymes are globular proteins that serve as biological catalysts. They speed up or slow down metabolic reaction, but remain unchanged. They may facilitate the breaking of an existing bond or the formation of a new bond....
- Enzymes
ENZYMES Enzymes are biological catalysts which influence biochemical reactions. All enzymes are proteins but all proteins are not enzymes because there are proteins other than enzymes. Ribozymes: These are the Nucleic acids (RNA) that behave like...
Biology
#17.1 Enzymes - Syllabus 2015
? Mode of action of enzymes
? Factors that affect enzyme action
Learning Outcomes
Candidates should be able to:
(a) explain that enzymes are globular proteins that catalyse metabolic reactions;
(b) explain the mode of action of enzymes in terms of an active site, enzyme-substrate complex, lowering of activation energy and enzyme specificity (the lock and key hypothesis and the induced fit hypothesis should be included);
(c) [PA] follow the progress of an enzyme-catalysed reaction by measuring rates of formation of products (for example, using catalase) or rates of disappearance of substrate (for example, using amylase);
(d) [PA] investigate and explain the effects of temperature, pH, enzyme concentration and substrate
concentration on the rate of enzyme-catalysed reactions;
(e) explain the effects of competitive and non-competitive inhibitors on the rate of enzyme activity;
(f) use the knowledge gained in this section in new situations or to solve related problems.
? Factors that affect enzyme action
Learning Outcomes
Candidates should be able to:
(a) explain that enzymes are globular proteins that catalyse metabolic reactions;
(b) explain the mode of action of enzymes in terms of an active site, enzyme-substrate complex, lowering of activation energy and enzyme specificity (the lock and key hypothesis and the induced fit hypothesis should be included);
(c) [PA] follow the progress of an enzyme-catalysed reaction by measuring rates of formation of products (for example, using catalase) or rates of disappearance of substrate (for example, using amylase);
(d) [PA] investigate and explain the effects of temperature, pH, enzyme concentration and substrate
concentration on the rate of enzyme-catalysed reactions;
(e) explain the effects of competitive and non-competitive inhibitors on the rate of enzyme activity;
(f) use the knowledge gained in this section in new situations or to solve related problems.
- Enzyme Inhibition
In competitive inhibition, inhibitor has a shape, charge, size and structure similar to that of the substrate. It therefore competes with the substrate for the active sites to form the enzyme-inhibitor complex (E-I complex) and reduces the number of active...
- Q: Distinguish Between Competitive And Non-competitive Inhibition Of Enzymes
A competitive inhibitor is structurally similar to the substrate but a non-competitive inhibitor is often structurally different from the substrate. Hence, a competitive inhibitor will compete with the substrate for an active site but a non competitive...
- #20.factors Affecting The Rate Of Enzyme-catalysed Reactions
These factors are: - Temperature - pH - Enzyme concentration - Substrate concentration - Inhibitor concentration When an enzyme solution is added to a solution of its substrate, the molecules collide. With time, the quantity of substrate...
- #18. Enzymes - Active Site, Activation Energy, Enzyme Specificity
Enzymes are globular proteins that serve as biological catalysts. They speed up or slow down metabolic reaction, but remain unchanged. They may facilitate the breaking of an existing bond or the formation of a new bond....
- Enzymes
ENZYMES Enzymes are biological catalysts which influence biochemical reactions. All enzymes are proteins but all proteins are not enzymes because there are proteins other than enzymes. Ribozymes: These are the Nucleic acids (RNA) that behave like...