Ornithine cycle was discovered by

Options

A. Ornithine
B. Calvin
C. Watson
D. Krebs and Henseleit

Answer

To answer the question regarding who discovered the Ornithine cycle, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Ornithine Cycle**: The Ornithine cycle, also known as the urea cycle, is a series of biochemical reactions that occur in the liver. Its primary function is to convert ammonia, which is toxic, into urea, which can be safely excreted from the body.

2. **Identifying the Scientists**: The Ornithine cycle was discovered by two key scientists. Their contributions to the understanding of this cycle are significant in the field of biochemistry.

3. **Naming the Scientists**: The two scientists who discovered the Ornithine cycle are Hans Krebs and Kurt Henslet. It is sufficient to remember their surnames: Krebs and Henslet.

4. **Location of the Cycle**: The Ornithine cycle takes place in the liver, which is an important organ for metabolism and detoxification in the body.

5. **Final Answer**: Therefore, the Ornithine cycle was discovered by Krebs and Henslet.