Multiple Choice
Which of the following classes of ATP-drive pumps can synthesize ATP when reversed?
9. Transport Across Membranes
Transporters
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Transporters always require energy to move solutes across a membrane?
A
True
B
False
Verified step by step guidance1
Understand the types of transport across cell membranes: passive transport and active transport.
Recognize that passive transport does not require energy. It includes processes like diffusion and facilitated diffusion, where solutes move down their concentration gradient.
Identify that active transport requires energy, usually in the form of ATP, to move solutes against their concentration gradient.
Consider the role of transporters: some transporters facilitate passive transport (e.g., channel proteins), while others are involved in active transport (e.g., pumps like the sodium-potassium pump).
Conclude that not all transporters require energy, as some are involved in passive transport processes.
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