In soyabean, the fixed nitrogen is transported in the form of

Options

A. nitrite
B. ureides
C. molecular nitrogen.
D. Protein

Answer

To solve the question regarding the form in which fixed nitrogen is transported in soybeans, let's break it down step by step:

### Step 1: Understanding Nitrogen Fixation
- Nitrogen is an essential nutrient for plants, crucial for the synthesis of proteins, hormones, vitamins, and chlorophyll.
- In the atmosphere, nitrogen exists as N2 gas, which is not directly usable by plants due to the strong triple bond between the nitrogen atoms.

**Hint:** Remember that nitrogen fixation is the process of converting atmospheric nitrogen into a usable form for plants.

### Step 2: Role of Microorganisms
- Certain prokaryotic organisms, such as bacteria (e.g., Rhizobium) and blue-green algae, possess nitrogen-fixing enzymes.
- These organisms convert atmospheric N2 into nitrogen oxides (NO2, N2O, NO) and other usable forms through natural processes.

**Hint:** Identify the microorganisms involved in nitrogen fixation and their role in converting N2 to usable nitrogen forms.

### Step 3: Transportation of Fixed Nitrogen
- Once nitrogen is fixed, it needs to be transported within the plant.
- In plants, nitrogen is primarily transported in the form of amides and amino acids, but in legumes like soybeans, it is transported in a more efficient form.

**Hint:** Focus on the specific forms of nitrogen transport in legumes compared to other plants.

### Step 4: Specialized Transport in Leguminous Plants
- In leguminous plants like soybeans, nitrogen is transported in the form of ureids, which are derivatives of urea.
- Ureids have a higher nitrogen-to-carbon ratio compared to amino acids and amides, making them a more efficient form for nitrogen transport.

**Hint:** Consider why ureids are favored for nitrogen transport in legumes over other forms.

### Step 5: Conclusion
- Therefore, in soybeans, the fixed nitrogen is transported in the form of ureids.

**Final Answer:** In soybeans, the fixed nitrogen is transported in the form of ureids.