Grade 10 Exam > Grade 10 Questions > Which statement is true of enzyme activity?a)...
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Which statement is true of enzyme activity?
- a)Enzyme activity depends on the number of collisions between the enzyme and substrate
- b)Most enzymes are not sensitive to temperature
- c)Extremes of pH are unlikely to denature an enzyme
Correct answer is option 'A'. Can you explain this answer?
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Which statement is true of enzyme activity?a)Enzyme activity depends o...
Enzyme activity depends on the number of collisions between the enzyme and substrate. An increase in temperature therefore increases the rate of enzyme activity, though high temperatures may denature an enzyme.
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Which statement is true of enzyme activity?a)Enzyme activity depends o...
Enzyme Activity
Enzyme activity depends on the number of collisions between the enzyme and substrate. This is because enzymes work by binding to specific substrates and facilitating chemical reactions. Here is a detailed explanation of why this statement is true:
Enzyme-Substrate Interaction
- Enzymes have specific active sites where substrates bind. When a substrate collides with an enzyme in the correct orientation, it forms an enzyme-substrate complex.
- The formation of this complex lowers the activation energy required for the reaction to occur, making it more likely for the substrate to be converted into products.
Collision Theory
- According to the collision theory, for a reaction to occur, particles must collide with sufficient energy and in the correct orientation.
- Therefore, the rate of enzyme activity is directly related to the frequency of collisions between enzymes and substrates.
Factors Affecting Enzyme Activity
- Temperature: Enzyme activity is affected by temperature, as higher temperatures increase the kinetic energy of molecules, leading to more collisions. However, extreme temperatures can denature enzymes.
- pH: Enzymes have an optimal pH at which they function best. Deviations from this pH can affect enzyme activity, as extreme pH levels can denature enzymes.
In conclusion, enzyme activity is dependent on the number of collisions between enzymes and substrates. Understanding this fundamental concept is crucial in studying enzyme kinetics and the factors that influence enzyme activity.
Enzyme activity depends on the number of collisions between the enzyme and substrate. This is because enzymes work by binding to specific substrates and facilitating chemical reactions. Here is a detailed explanation of why this statement is true:
Enzyme-Substrate Interaction
- Enzymes have specific active sites where substrates bind. When a substrate collides with an enzyme in the correct orientation, it forms an enzyme-substrate complex.
- The formation of this complex lowers the activation energy required for the reaction to occur, making it more likely for the substrate to be converted into products.
Collision Theory
- According to the collision theory, for a reaction to occur, particles must collide with sufficient energy and in the correct orientation.
- Therefore, the rate of enzyme activity is directly related to the frequency of collisions between enzymes and substrates.
Factors Affecting Enzyme Activity
- Temperature: Enzyme activity is affected by temperature, as higher temperatures increase the kinetic energy of molecules, leading to more collisions. However, extreme temperatures can denature enzymes.
- pH: Enzymes have an optimal pH at which they function best. Deviations from this pH can affect enzyme activity, as extreme pH levels can denature enzymes.
In conclusion, enzyme activity is dependent on the number of collisions between enzymes and substrates. Understanding this fundamental concept is crucial in studying enzyme kinetics and the factors that influence enzyme activity.
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Which statement is true of enzyme activity?a)Enzyme activity depends on the number of collisions between the enzyme and substrateb)Most enzymes are not sensitive to temperaturec)Extremes of pH are unlikely to denature an enzymeCorrect answer is option 'A'. Can you explain this answer?
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