Some plant cells take advantage of the high concentration of protons outside the cell to move solutes, such as sucrose, across the plasma membrane into the cell where the sucrose concentration is already relatively high. This type of transport is an example of:
A)facilitated diffusion.
B)osmosis.
C)secondary active transport.
D)passive transport.

Question

Quizplus · Accepted Answer

This type of transport, where a solute is moved against its concentration gradient using the energy from a proton gradient, is called secondary active transport. It requires a carrier protein or co-transporter to facilitate the movement of the solute. Facilitated diffusion, osmosis, and passive transport do not involve the use of energy or proton gradients to move solutes against their concentration gradient.

Some Plant Cells Take Advantage of the High Concentration of Protons