IGNOU LSE 5 2026 - Describe the role of proton pump in active transport of protons across

Question

Describe the role of proton pump in active transport of protons across plasma-membrane.

28 Jan 2026

Answer :

Word Count : 274

Proton pumps are membrane-bound proteins that play a crucial role in the active transport of protons (H⁺ ions) across the plasma membrane against their electrochemical gradient. This process requires metabolic energy, usually derived from the hydrolysis of ATP, and is essential for maintaining cellular homeostasis, pH regulation, and secondary transport mechanisms. The most common proton pump involved in plasma membranes is the H⁺-ATPase, also known as the proton-translocating ATPase. The proton pump functions by coupling the energy released from ATP hydrolysis to

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