Multiple choice

Contractile vacuoles are found in protists. What is their role?

  1. They store starch and glucose.

  2. They contain lytic enzymes.

  3. They pump water out of cells.

  4. They provide buoyancy to float.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The role of the contractile vacuoles is to pump water out of the cell through a process called osmoregulation. Too much water in the cells may lead to bursting of cells. They expand when water enters (called the diastole) and contract when filled with water, carrying water along with wastes outside the cell (called the systole).

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