The correct order of increase in the size of the structures listed below is
(i) Proteins
(ii) Plant cell
(iii) Mitochondria
(iv) Ribosomes

Options

A. (i), (iv), (iii), (ii)
B. (ii), (i), (iii) or (iv)
C. (ii), (iii), (i), (iv)
D. (iii), (ii), (i), (iv)

Answer

To determine the correct order of increase in size of the structures listed (proteins, plant cell, mitochondria, and ribosomes), we can analyze each structure based on their typical sizes.

### Step-by-Step Solution:

1. **Understanding the Structures**:
- **Proteins**: These are macromolecules made up of amino acids. They are typically measured in nanometers (nm) and are the smallest among the listed structures.
- **Ribosomes**: These are cellular structures that synthesize proteins. Ribosomes are larger than proteins but are still relatively small, usually around 20-30 nm in size.
- **Mitochondria**: These are organelles within cells responsible for energy production. Mitochondria are significantly larger than ribosomes, typically ranging from 0.5 to 10 micrometers (µm) in size.
- **Plant Cell**: A plant cell is a complete unit containing various organelles, including mitochondria and ribosomes. Plant cells are the largest structures in this list, generally measuring around 10-100 µm.

2. **Comparing Sizes**:
- Based on the sizes:
- Proteins < Ribosomes < Mitochondria < Plant Cell

3. **Conclusion**:
- The correct order of increase in size of the structures is:
- (i) Proteins < (iv) Ribosomes < (iii) Mitochondria < (ii) Plant Cell

### Final Answer:
The correct order of increase in size is:
**Proteins < Ribosomes < Mitochondria < Plant Cell**

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