Plant cells load sucrose against its gradient with a symporter that binds H+ and sucrose together, using the steep H+ difference kept across their plasma membrane. Where does the energy for sucrose accumulation ultimately come from?

Question

Accepted Answer

A. From ATP spent by an H+ pump that builds the proton gradient the symporter exploits.

Answer

From ATP spent by an H+ pump that builds the proton gradient the symporter exploits.

Answer

Sunlight strikes the symporter directly and powers each sucrose molecule individually.

Answer

Breaking sucrose apart inside the cell releases energy that the symporter recaptures.

Answer

The sucrose gradient itself powers further uptake, needing no prior investment anywhere.

Plant cells load sucrose against its gradient with a symporter that binds H+ and sucrose together, using the steep H+ difference kept across their plasma membrane. Where does the energy for sucrose accumulation ultimately come from?

Explanation

Core Concept

Correct Answer

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