Membrane bound organelles are absent in

Options

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

Answer

To solve the question "Membrane bound organelles are absent in," we will analyze the given options one by one to determine which organism is a prokaryote, as prokaryotes are characterized by the absence of membrane-bound organelles.

### Step-by-Step Solution:

1. **Understand the Concept of Membrane-Bound Organelles**:
- Membrane-bound organelles are structures within cells that are enclosed by membranes, such as the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus.
- Prokaryotic cells, which include bacteria, do not have these organelles.

2. **Identify the Organisms in the Options**:
- The options given are:
- A) Plasmodium
- B) Saccharomyces
- C) Streptococcus
- D) Chlamydomonas

3. **Analyze Each Option**:
- **Option A: Plasmodium**:
- Plasmodium is a unicellular organism that belongs to the kingdom Protista.
- It is a eukaryote, meaning it has membrane-bound organelles.
- Therefore, this option is incorrect.

- **Option B: Saccharomyces**:
- Saccharomyces is a genus of unicellular fungi (yeast) that belongs to the kingdom Mycota (Fungi).
- Being a eukaryote, it also contains membrane-bound organelles.
- Thus, this option is incorrect.

- **Option C: Streptococcus**:
- Streptococcus is a genus of bacteria, which are unicellular organisms.
- Bacteria belong to the kingdom Monera, which is composed of prokaryotes.
- Since prokaryotes lack membrane-bound organelles, this option is correct.

- **Option D: Chlamydomonas**:
- Chlamydomonas is a unicellular green alga that has been classified under the kingdom Protista.
- As a eukaryote, it possesses membrane-bound organelles.
- Therefore, this option is incorrect.

4. **Conclusion**:
- The only organism from the options provided that lacks membrane-bound organelles is **Streptococcus** (Option C), as it is a prokaryote.

### Final Answer:
**C) Streptococcus**