BIOLOGY
PROTEINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The graph below shows the effect of substrate concentration on the action of enzyme X. This enzyme is functioning at its optimal temperature, 36◦C, and at its optimal pH, 5.5. When the substrate concentration increases from 0.4% to 0.5%, the rate of the reaction
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decreases
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increases
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remains the same
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increases, then decreases
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Explanation:
Detailed explanation-1: -Enzyme kinetics graph showing rate of reaction as a function of substrate concentration.
Detailed explanation-2: -So, the correct answer is ‘Velocity of reaction’
Detailed explanation-3: -Enzymes will work best if there is plenty of substrate. As the concentration of the substrate increases, so does the rate of enzyme activity. However, the rate of enzyme activity does not increase forever.
Detailed explanation-4: -If we plot a graph with substrate concentration on X-axis and corresponds velocity in Y-axis. It is observed that as there is an increase in the concentration of the substrate, there is a corresponding increase in the reaction. It forms an arc-shaped curve.
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