The diagram shows how nicotine is transported from the blood plasma into a cell using a type of cotransporter mechanism.
In the phloem tissue, there is a cotransporter mechanism that moves sucrose into the cytoplasm of a companion cell.
Which statement correctly describes a similarity between the cotransport of nicotine and the cotransport of sucrose?
1 )
The cotransporter proteins generate a proton gradient by moving protons out of the cell by active transport.
2 )
The protons are transported through the cotransporter proteins by facilitated diffusion.
The protons move through the cotransporter proteins in the opposite direction to the movement of nicotine and sucrose.
4 )
The cotransporter proteins use energy from ATP to transport protons with nicotine and sucrose.
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