Question

10 The graph shows the effect of temperature on the rate of an enzyme-controlled reaction. Which statements are correct? A 1 2 3 rate 1, 2 and 3 temperature The collision frequency between substrate and enzyme increases between X and Y The shape of the active site is altered between Y and Z. The enzyme is denatured irreversibly at X and Z. 1 and 2 only C 1 only 2 and 3 only​

Answer 1

An increase in temperature generally increases the rate of enzyme-catalyzed reactions. At high temperatures, the enzyme becomes denatured and the rate decreases. The graph shows the effect of temperature on enzyme activity.

Step-by-step explanation:

An increase in temperature generally increases the rate of enzyme-catalyzed reactions. However, at high temperatures, the enzyme becomes denatured and the rate decreases. The graph shows that as the temperature increases, the rate of the enzyme activity also increases, reaching an optimum activity at the enzyme's optimum temperature. After that, the rate sharply decreases as the enzyme's active site changes shape.

Therefore, statements 1 and 2 are correct. The enzyme is denatured irreversibly at X and Z, so statement 3 is incorrect. The correct option is C: 1 and 2 only.