When a potassium ion (K+)moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the ion?
A) plasma membrane → primary cell wall → cytoplasm → vacuole
B) secondary cell wall → plasma membrane → primary cell wall → cytoplasm → vacuole
C) primary cell wall → plasma membrane → cytoplasm → vacuole
D) primary cell wall → plasma membrane → lysosome → cytoplasm → vacuole
E) primary cell wall → plasma membrane → cytoplasm → secondary cell wall → vacuole

Question

Quizplus · Accepted Answer

The correct order is primary cell wall (which surrounds the plasma membrane), plasma membrane, cytoplasm, and then vacuole. The secondary cell wall is not present in all plant cells and would not be encountered by the potassium ion during its transport. Lysosomes are not involved in the uptake of potassium ions.

When a Potassium Ion (K+)moves from the Soil into the Vacuole