Inosinic pathway occurs in

Options

A. Ammonotelism
B. Ureotelism
C. Uricotelism
D. Guanotelism

Answer

### Step-by-Step Solution:

1. **Understanding the Inosinic Pathway**: The inosinic pathway refers to the synthesis of inosine monophosphate (IMP), which is a crucial intermediate in the purine nucleotide synthesis. It is the first nucleotide formed in the pathway leading to the production of purines.

2. **Location of the Inosinic Pathway**: The inosinic pathway primarily occurs in the liver. This is significant because the liver is a central organ for metabolic processes, including the synthesis of urea from ammonia.

3. **Connection to Urea Cycle**: In the liver, ammonia (NH3) combines with carbon dioxide (CO2) to form urea, which is a key component of the urea cycle. The inosinic pathway is linked to the urea cycle as it involves the synthesis of nucleotides, which are vital for energy metabolism.

4. **Formation of ATP**: During the inosinic pathway, adenosine triphosphate (ATP) is produced from inosine monophosphate (IMP). ATP is an essential energy carrier in cells, further emphasizing the importance of the inosinic pathway in metabolic processes.

5. **Conclusion**: The inosinic pathway occurs in ureotelic organisms, which are organisms that excrete nitrogen primarily in the form of urea. This pathway is crucial for the synthesis of purine nucleotides and plays a role in energy metabolism.

### Final Answer:
The inosinic pathway occurs in ureotelic organisms.

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