Folding and unfolding of actin and myosin leads to amoeboid movements. This was hypothesized by

Options

A. Allen
B. Goldacre and Lorsch
C. Berthold
D. Jennings.

Answer

To answer the question regarding who hypothesized that the folding and unfolding of actin and myosin leads to amoeboid movements, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Proteins Involved**:
- Actin and myosin are both contractile proteins. Actin forms thin filaments, while myosin forms thick filaments. Together, they play a crucial role in muscle contraction and cellular movements.

2. **Mechanism of Movement**:
- The movement of amoebas is characterized by the formation of pseudopodia, which are temporary projections of the cell. This movement is facilitated by the dynamic interactions between actin and myosin.

3. **Folding and Unfolding**:
- The hypothesis states that the folding and unfolding of actin and myosin filaments contribute to the amoeboid movement. When these proteins interact, they can change shape, allowing the cell to extend and retract, leading to movement.

4. **Identifying the Hypothesis Origin**:
- The question asks for the scientist who proposed this hypothesis. Among the options provided, we need to identify the correct one.

5. **Evaluating the Options**:
- The options given are:
- A) Allen
- B) Goldacher and Lortz
- C) Borthold
- D) Jennings
- From the information provided in the video transcript, it is stated that the hypothesis regarding the folding and unfolding of actin and myosin leading to amoeboid movements was proposed by Goldacher and Lortz.

6. **Conclusion**:
- Therefore, the correct answer to the question is **Goldacher and Lortz**.

### Final Answer:
The hypothesis that folding and unfolding of actin and myosin leads to amoeboid movements was proposed by **Goldacher and Lortz**.

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