The set of the organelles/structure that are absent in plant cell are

Options

A. 70S - Ribosome + dictyosomes
B. 80S - Ribosome + dictyosomes
C. Vacuole + chloroplast
D. Centriole + mesosomes

Answer

To solve the question regarding the organelles or structures that are absent in plant cells, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Plant Cell Organelles**:
- Plant cells have specific organelles that are characteristic of their function, such as chloroplasts for photosynthesis, large central vacuoles for storage and maintaining turgor pressure, and cell walls for structural support.

2. **Evaluating the Options**:
- **Option 1: 70s ribosome + Dictyosome**:
- 70s ribosomes are found in plastids (like chloroplasts) in plant cells, and dictyosomes (Golgi bodies) are present in plant cells.
- **Conclusion**: Both are present in plant cells.

- **Option 2: 80s ribosome + Dictyosome**:
- 80s ribosomes are the type found in eukaryotic cells, including plant cells, and dictyosomes (Golgi bodies) are also present in plant cells.
- **Conclusion**: Both are present in plant cells.

- **Option 3: Vacuole + Chloroplasts**:
- Vacuoles are large and prominent in plant cells, and chloroplasts are essential for photosynthesis in plants.
- **Conclusion**: Both are present in plant cells.

- **Option 4: Centriole + Mesosome**:
- Centrioles are found in animal cells and play a role in cell division. Mesosomes are structures associated with prokaryotic cells (bacteria) and are not found in plant cells.
- **Conclusion**: Both are absent in plant cells.

3. **Final Answer**:
- The set of organelles/structures that are absent in plant cells is **Option 4: Centriole + Mesosome**.