Question

A transport protein is analogous to a ________?

1) wall partition
2) subway train
3) light switch
4) voice identification device
5) television receiver

Answer 1

A transport protein is analogous to a subway train as both move specific 'cargo' from one place to another; transport proteins facilitate the passage of substances across the cell membrane.

Step-by-step explanation:

A transport protein is analogous to a subway train. This analogy is because transport proteins, such as carrier proteins or channels, facilitate the movement of substances across the cell membrane much like a subway train carries people from one point to another through a city. Specifically, carrier proteins bind to a substance and then change shape to move the substance across the membrane. They are specific for their cargo, often transporting substances that cannot pass freely through the membrane, including large molecules like amino acids and glucose.