Cell-city analogy
In a far away city, called Grant, the main export and production product is the steel widget. Everyone in the city has something to do with steel widget making, and the entire city is designed to build and export widgets. The town hall has the instructions for widget making. Widgets come in all shapes and sizes and any citizen of Grant can get the instruction and begin making their own widgets. Widgets are generally produced in the small shop around the city, and these small shops can be built by the carpenter's union (whose headquarters are in town hall). After the widget is constructed, they are placed on special carts which can deliver the widget anywhere in the city. In order for a widget to be exported, the carts take the widget to the postal office, where the widgets are packaged and labelled for export. Sometimes widgets do not turn out right, and the ‘rejects are sent to the scrap yard where they are broken down for parts or destroyed altogether. The town powers the widget shops and carts from a hydraulic dam in the city. The entire city is enclosed by a large wooden fence. Only the postal trucks (and citizens with proper passports) are allowed outside the city. Match the parts of the city printed in bold with the parts of the cell:
(a) Mitochondria ________________
(b) Ribosomes ________________
(c) Nucleus ________________
(d) Endoplasmic reticulum _________________
(e) Golgi apparatus _____________
(f) Protein ______________
(g) Cell membrane ________________
(h) Lysosomes ________________
(i) Nucleolus _______________

Explanation

To solve the cell-city analogy, we need to match the parts of the city with the corresponding parts of a cell based on their functions. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Mitochondria**: In the analogy, the hydraulic dam powers the entire city, just as mitochondria provide energy to the cell.
- **Match**: Mitochondria → Hydraulic dam

2. **Ribosomes**: The small shops around the city produce widgets, similar to how ribosomes synthesize proteins in the cell.
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