Membrane bound organelles are absent in

Options

A. Plasmodium
B. Saccharomyces
C. Streptococcus
D. Chalmydomonas

Answer

To solve the question "Membrane bound organelles are absent in," we will analyze the given options and determine which organism is prokaryotic, as membrane-bound organelles are typically absent in prokaryotic cells.

### Step-by-Step Solution:

1. **Understand the Concept of Membrane-Bound Organelles**:
- Membrane-bound organelles are structures within cells that are surrounded by membranes, such as the nucleus, endoplasmic reticulum, and mitochondria. These organelles are characteristic of eukaryotic cells.

2. **Identify the Types of Cells**:
- There are two main types of cells: prokaryotic and eukaryotic.
- Prokaryotic cells (e.g., bacteria) do not have membrane-bound organelles, while eukaryotic cells (e.g., plants, animals, fungi, and protists) do.

3. **Examine the Options**:
- **Plasmodium**: A unicellular eukaryote (a protist) that has membrane-bound organelles.
- **Saccharomyces**: A unicellular eukaryote (a type of yeast) that also has membrane-bound organelles.
- **Streptococcus**: A genus of bacteria, which are prokaryotic and do not have membrane-bound organelles.
- **Chlamydomonas**: A unicellular eukaryote (a green alga) that has membrane-bound organelles.

4. **Determine the Correct Answer**:
- Among the options, **Streptococcus** is the only organism that is prokaryotic and therefore lacks membrane-bound organelles.

5. **Conclusion**:
- The correct answer is **Streptococcus**.

### Final Answer:
**Streptococcus** (Option C) is the organism in which membrane-bound organelles are absent.

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