Turn-over number of the fastest enzyme is

Options

A. `18xx10^(4)`
B. `10^(4)`
C. `36xx10^(6)`
D. `10^(5)`.

Answer

To determine the turnover number of the fastest enzyme, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Turnover Number**:
- The turnover number (often represented as \( k_{cat} \)) of an enzyme is defined as the number of substrate molecules converted into product by one enzyme molecule in a given time period, typically measured per minute.

2. **Identifying the Fastest Enzyme**:
- The fastest enzyme known is carbonic anhydrase. It catalyzes the conversion of carbon dioxide and water to bicarbonate and protons, playing a crucial role in physiological processes.

3. **Finding the Turnover Number of Carbonic Anhydrase**:
- The turnover number of carbonic anhydrase is reported to be 36 million per minute. This can be expressed in scientific notation as \( 36 \times 10^6 \).

4. **Evaluating the Options**:
- The options given are:
- A) \( 18 \times 10^4 \)
- B) \( 10^4 \)
- C) \( 36 \times 10^6 \) (This is the correct answer)
- D) \( 10^5 \)

5. **Selecting the Correct Answer**:
- Among the options, \( 36 \times 10^6 \) is the only one that matches the turnover number of carbonic anhydrase.

### Final Answer:
The turnover number of the fastest enzyme, carbonic anhydrase, is \( 36 \times 10^6 \).

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