[Campbell Biology P.175] What is the key difference between active and passive transport acr... | Practice Question

What is the key difference between active and passive transport across a cell membrane, according to the provided information?

• A: Passive transport requires energy investment, while active transport does not.
• B: Active transport moves solutes against their concentration gradients, whereas passive transport moves them with their gradients.
• C: Passive transport always involves transport proteins, while active transport never does.
• D: Active transport primarily moves large molecules, while passive transport primarily moves small molecules.