A city border functions like a cell membrane because the city border surrounds the city, just like a cell membrane does with a cell

Border patrol functions like a cell wall because border patrol controls what enters in an out or the city just like a cell wall does with the cell

Public transportation functions like a vesicle because public transport moves objects in a city just like vesicles move proteins in the cell

Greenhouses function like chloroplasts because greenhouses store light energy for plants as chloroplasts store light energy for the cell

Data centers are like chromatin because data centers store information for city, just as chromatin store DNA for a cell.

Streets function like cytoplasm because cytoplasm allows organelles to move within the cell as streets allow citizens to move within the city.

Land masses function like a cytoskeleton because a city's shape and form is based off of the land it is made on, just as a cell receives its structure from the cytoskeleton.

Factories function like endoplasmic reticulum because factories synthesize, modify, package, and ship whatever the city needs, just as endoplasmic reticulum does for the cell.

Post offices function like the Golgi apparatus because the post office modifies, sorts, and packages to be sent away from the city or to be taken into the city, just as the Golgi apparatus does with proteins in the cell.

Power plants function like mitochondria because power plants produce energy that can be used in the city, and mitochondria does the same in the cell.

File cabinets function like a nucleolus because file cabinets files and sorts information

A mayor functions as a nucleus because he/she leads and controls components of the city just like the nucleus in the cell controls organelle functions.

Recycling plants function just as ribosomes do because they balance and reuse proteins in the city just as the ribosomes do in the cell.