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Select all false statements for an enzym...

Select all false statements for an enzyme promoting a chemical reaction by -
I. Lowering the energy of activation
II. Causing the release of heat, which acts as a primer
III. Increasing molecular motion
IV. Changing the free energy difference between substrate and product

A

I and IV

B

I and III

C

II, III, IV

D

III and IV

Text Solution

AI Generated Solution

The correct Answer is:
To determine the false statements regarding how enzymes promote chemical reactions, we will analyze each statement provided in the question: **Step 1: Analyze Statement I** - **Statement I:** Lowering the energy of activation. - **Analysis:** This statement is true. Enzymes function by lowering the activation energy required for a reaction to occur, which increases the rate of the reaction. **Step 2: Analyze Statement II** - **Statement II:** Causing the release of heat, which acts as a primer. - **Analysis:** This statement is false. Enzymes do not primarily promote reactions by releasing heat. Instead, they lower the activation energy. While some reactions may release heat, it is not a mechanism by which enzymes facilitate reactions. **Step 3: Analyze Statement III** - **Statement III:** Increasing molecular motion. - **Analysis:** This statement is true. Enzymes can increase the rate of reaction by facilitating interactions between molecules, which can lead to increased molecular motion. However, the primary role of enzymes is to lower activation energy. **Step 4: Analyze Statement IV** - **Statement IV:** Changing the free energy difference between substrate and product. - **Analysis:** This statement is false. Enzymes do not change the free energy difference between the substrate and product; they only affect the rate at which equilibrium is reached. The overall energy change (ΔG) remains the same. **Conclusion: Identify False Statements** - The false statements are: - **Statement II:** Causing the release of heat, which acts as a primer. - **Statement IV:** Changing the free energy difference between substrate and product. ### Summary of False Statements: - II and IV are false statements regarding how enzymes promote chemical reactions.
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