Metabolic inhibitors which prevent active uptake of ions in plants are

Options

A. Competitive
B. Non - competitive
C. Allosteric
D. All

Answer

To answer the question about which metabolic inhibitors prevent the active uptake of ions in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Active Uptake of Ions**:
- Active uptake of ions in plants is a process that requires energy, typically in the form of ATP. This process is essential for transporting ions from the soil into the root cells.

2. **Role of Enzymes**:
- Enzymes play a crucial role in facilitating the active transport of ions. They help in moving ions across the plasma membrane of root cells.

3. **Types of Metabolic Inhibitors**:
- There are different types of metabolic inhibitors: competitive, non-competitive, and allosteric inhibitors. Each type interacts with enzymes differently.

4. **Mechanism of Non-Competitive Inhibitors**:
- Non-competitive inhibitors bind to an enzyme at a site other than the active site. This binding alters the shape of the enzyme, reducing its efficiency in catalyzing reactions.

5. **Impact on Ion Uptake**:
- When non-competitive inhibitors bind to the enzyme, they decrease the enzyme's ability to facilitate the active uptake of ions. This results in a reduced transport of ions into the plant cells.

6. **Conclusion**:
- Since non-competitive inhibitors do not bind to the active site but still inhibit the enzyme's function, they are responsible for preventing the active uptake of ions in plants.

### Final Answer:
The metabolic inhibitors that prevent the active uptake of ions in plants are **non-competitive inhibitors**.

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