객관식
Which of the following statements is TRUE regarding an enzyme's function?
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12. Microbial Metabolism
Enzyme Activation Energy
1:55분문제 3
교과서 질문
An enzyme and substrate are combined. The rate of reaction begins as shown in the following graph. To complete the graph, show the effect of increasing substrate concentration on a constant enzyme concentration. Show the effect of increasing temperature.
검증된 단계별 안내1
Understand that the graph initially shows the reaction rate when enzyme and substrate are combined at certain concentrations and conditions.
To show the effect of increasing substrate concentration at constant enzyme concentration, recall that the reaction rate will increase as substrate concentration increases, but only up to a point where the enzyme becomes saturated. This results in a curve that rises steeply at first and then levels off, approaching a maximum velocity (Vmax).
Represent this by drawing a hyperbolic curve that starts at the origin, rises sharply, and then plateaus, indicating that adding more substrate beyond saturation does not increase the rate further.
To show the effect of increasing temperature, remember that reaction rate generally increases with temperature due to higher kinetic energy, up to an optimum temperature. Beyond this optimum, the enzyme denatures and the rate sharply decreases.
Illustrate this by drawing a curve that rises with temperature to a peak (optimum temperature) and then falls off rapidly, showing enzyme denaturation and loss of activity at higher temperatures.
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1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Enzyme-Substrate Interaction and Reaction Rate
Enzymes bind to substrates to form an enzyme-substrate complex, facilitating the conversion to product. The reaction rate initially increases with substrate concentration as more substrate molecules are available, but eventually plateaus when all enzyme active sites are saturated, showing a maximum velocity (Vmax).
추천 영상:
03:49
Enzyme-Substrate Complex
Effect of Substrate Concentration on Enzyme Activity
Increasing substrate concentration at a constant enzyme level raises the reaction rate until the enzyme becomes saturated. Beyond this point, adding more substrate does not increase the rate, resulting in a hyperbolic curve typical of Michaelis-Menten kinetics.
추천 영상:
03:49Enzyme-Substrate Complex
Effect of Temperature on Enzyme Activity
Temperature influences enzyme activity by affecting molecular motion and enzyme stability. As temperature rises, reaction rate increases up to an optimum point due to faster collisions, but beyond this, enzymes denature and activity sharply decreases.
추천 영상:
04:18Enzyme Activation Energy
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