Microfilaments were discovered by
(a) Slautterback
(b) Paleviz et al
(c) Altman
(d) Ledbetter and Porter

Options

A. Slautterback
B. Paleviz et al
C. Altman
D. Ledbetter and Porter

Answer

To solve the question "Microfilaments were discovered by", we will analyze the options provided and identify the correct answer based on historical context.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks who discovered microfilaments, which are also known as actin filaments and are a component of the cytoskeleton in eukaryotic cells.

2. **Review the Options**:
- (a) Slautterback
- (b) Paleviz et al
- (c) Altman
- (d) Ledbetter and Porter

3. **Research Each Option**:
- **Slautterback**: Known for contributions to cell biology but not specifically for microfilaments.
- **Paleviz et al**: They are credited with the discovery of microfilaments in 1974.
- **Altman**: Not associated with the discovery of microfilaments.
- **Ledbetter and Porter**: Known for their work on the cytoskeleton but not specifically for microfilaments.

4. **Identify the Correct Answer**: Based on the research, the correct answer is (b) Paleviz et al, as they discovered microfilaments in 1974.

5. **Final Answer**: Therefore, the answer to the question is (b) Paleviz et al.