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Question

2. Which of the following statements about triosephosphate isomerase (TIM) is NOT true? Explain.

(a) The mechanism of action of TIM involves a conformational change in the structure of the enzyme that prevents escape of an activated intermediate.

(b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3phosphate.

(c) The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction.
Step 1/2

Question: Which of the following statements about triosephosphate isomerase (TIM) is NOT true? Explain.

(a) The mechanism of action of TIM involves a conformational change in the structure of the enzyme that prevents escape of an activated intermediate.
(b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3phosphate.
(c) The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction. Importance Triosephosphate Isomerase Essay Sample

Answer:

The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3-phosphate is NOT true.

The rate-limiting step in the reaction catalyzed by TIM is the formation of the intermediate, not the release of the product.

Explanation for step 1

Triosephosphate isomerase (TIM) is an enzyme that catalyzes the reversible interconversion of dihydroxyacetone phosphate and glyceraldehyde 3-phosphate.
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Step 2/2

The reaction involves the transfer of a phosphate group from one molecule to another. The rate-limiting step in the reaction is the formation of the intermediate, not the release of the product glyceraldehyde 3-phosphate.

Explanation for step 2

This is because the formation of the intermediate is the slowest step in the reaction, and the rate of the overall reaction is determined by the rate of this step. The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction, which suggests that the reaction is highly efficient and that TIM plays an important role in metabolic pathways.

Final answer

(b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3-phosphate is NOT true. Importance Triosephosphate Isomerase Essay Sample

Expert Answer

Question

2. Which of the following statements about triosephosphate isomerase (TIM) is NOT true? Explain. (a) The mechanism of action of TIM involves a conformational change in the structure of the enzyme that prevents escape of an activated intermediate. (b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3phosphate. (c) The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction.

Step 1/2

Question: Which of the following statements about triosephosphate isomerase (TIM) is NOT true? Explain.

(a) The mechanism of action of TIM involves a conformational change in the structure of the enzyme that prevents escape of an activated intermediate.

(b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3phosphate.

(c) The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction. Importance Triosephosphate Isomerase Essay Sample

Answer:

The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3-phosphate is NOT true.

The rate-limiting step in the reaction catalyzed by TIM is the formation of the intermediate, not the release of the product.

Explanation for step 1

Triosephosphate isomerase (TIM) is an enzyme that catalyzes the reversible interconversion of dihydroxyacetone phosphate and glyceraldehyde 3-phosphate.

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Step 2/2

The reaction involves the transfer of a phosphate group from one molecule to another. The rate-limiting step in the reaction is the formation of the intermediate, not the release of the product glyceraldehyde 3-phosphate.

Explanation for step 2

This is because the formation of the intermediate is the slowest step in the reaction, and the rate of the overall reaction is determined by the rate of this step. The k cat/KM ratio for the reaction catalyzed by TIM is close to the diffusion-controlled limit for a bimolecular reaction, which suggests that the reaction is highly efficient and that TIM plays an important role in metabolic pathways.

Final answer

(b) The rate-limiting step in the reaction catalyzed by TIM is the release of the product glyceraldehyde 3-phosphate is NOT true. Importance Triosephosphate Isomerase Essay Sample

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