Biology Quiz: Cell Membranes

Think you know all about cell membranes? Use this self-quiz to make sure you remember active transport, plasma membranes, lipid bilayer, and more. Continue reading

My Cell Membranes

Use these flash cards to practice your grasp of endocytosis, exocytosis, turgor pressure, and dozens of other biology terms. Continue reading

Carrier Proteins

Carrier proteins help specific molecules or ions pass through the plasma membrane. Do you know how carrier proteins work? This interactive tutorial will help you to absorb this key concept. Continue reading