Escherichia coli is used in biological researches because

Options

A. it is easily available
B. it can be easily cultured
C. it is easy to handle
D. it can easily multiply in the host

Answer

**Step-by-Step Solution:**

1. **Understanding the Organism**: Escherichia coli (E. coli) is a type of bacteria that is commonly found in the intestines of humans and animals. It is often used in biological research due to its unique characteristics.

2. **Genome Size**: E. coli has a relatively small genome size compared to other organisms. This makes it easier for researchers to manipulate its genetic material and study gene functions.

3. **Culturing Ease**: One of the primary reasons E. coli is used in research is that it can be easily cultured in a laboratory setting. This means that scientists can grow large quantities of E. coli quickly and efficiently.

4. **Growth Rate**: E. coli has a high growth rate, allowing researchers to obtain results in a shorter time frame compared to more complex organisms. This rapid reproduction is advantageous for experiments that require quick results.

5. **Model Organism**: E. coli is a well-studied model organism, meaning that a vast amount of information is already available about its biology, genetics, and physiology. This extensive background knowledge allows researchers to design experiments more effectively.

6. **Conclusion**: Given these characteristics, the most significant reason E. coli is widely used in biological research is that it can be easily cultured. This ability to grow and multiply in a controlled environment is crucial for various experiments, including genetic research and protein engineering.

**Final Answer**: Escherichia coli is used in biological research primarily because it can be easily cultured.

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