Avery, Mc Carty and Macleod fractionated bacteria into

Options

A. DNA, carbohydrate and proteins
B. DNA, lipid and proteins
C. Carbohydrate, lipid and proteins
D. DNA, carbohydrate and lipid

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question refers to the work of scientists Oswald Avery, Colin MacLeod, and Maclyn McCarty in 1944, who conducted experiments to identify the genetic material in bacteria.

2. **Identifying the Experiment**: They performed a bacterial transformation experiment using the bacterium *Streptococcus pneumoniae*. This experiment was crucial in determining whether DNA, RNA, proteins, or other components were responsible for heredity.

3. **Fractionation of Bacteria**: In their experiment, Avery, MacLeod, and McCarty fractionated the bacteria into four main components:
- **DNA**: The nucleic acid that carries genetic information.
- **RNA**: Another nucleic acid involved in protein synthesis.
- **Carbohydrates**: Organic compounds that serve as energy sources and structural components.
- **Proteins**: Molecules made up of amino acids that perform a variety of functions in the cell.

4. **Hypothesis Testing**: Their hypothesis was that one of these components was the genetic material. They systematically tested each component to see which one could transform non-virulent bacteria into virulent forms.

5. **Evaluating Options**: The question likely provides multiple-choice options. The correct answer should include DNA, RNA, carbohydrates, and proteins.

6. **Conclusion**: Based on their findings, the correct answer to the question is that Avery, McCarty, and MacLeod fractionated bacteria into DNA, RNA, carbohydrates, and proteins.

**Final Answer**: Avery, McCarty, and MacLeod fractionated bacteria into DNA, RNA, carbohydrates, and proteins.

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