Roots of which of these plants contain a pigment which creates an anaerobic condition for a specific enzyme to function ?

Options

A. Carrot
B. Soybean
C. Mustard
D. Radish

Answer

To solve the question regarding which plant's roots contain a pigment that creates an anaerobic condition for a specific enzyme to function, we can follow these steps:

### Step 1: Understand the Question
The question asks about a specific pigment found in the roots of certain plants that creates an anaerobic (oxygen-free) environment for an enzyme to function properly.

### Step 2: Identify the Options
The options provided are:
1. Carrot
2. Soya bean
3. Mustard
4. Reddish

### Step 3: Analyze Each Option
- **Carrot**: This plant belongs to the family Apiaceae and does not have a known pigment that creates anaerobic conditions in its roots.

- **Soya bean**: This plant belongs to the legume family (Fabaceae) and is known to form root nodules in symbiosis with nitrogen-fixing bacteria. These nodules contain a red pigment called leghemoglobin, which creates an anaerobic environment for the enzyme nitrogenase to function effectively.

- **Mustard**: This plant belongs to the Brassicaceae family and does not have a specific pigment that creates anaerobic conditions in its roots.

- **Reddish**: Similar to mustard, this plant also belongs to the Brassicaceae family and does not have the required pigment.

### Step 4: Determine the Correct Answer
Based on the analysis, the only plant that fits the criteria of having roots containing a pigment that creates an anaerobic condition for a specific enzyme (nitrogenase) to function is **Soya bean**.

### Step 5: Conclusion
The correct answer is **Soya bean**.

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