B2.1 Membranes and membrane transport Quiz
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5 questions, one answer each
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1. Which substance crosses a pure phospholipid bilayer fastest?
- A. Sodium ions
- B. Glucose
- C. Oxygen
- D. Chloride ions
2. A cell is placed in a solution with a lower solute concentration than its cytoplasm. What happens?
- A. Water leaves the cell
- B. Water enters the cell by osmosis
- C. Solutes enter by osmosis
- D. No movement occurs
3. Which process can move ions against a concentration gradient?
- A. Simple diffusion
- B. Facilitated diffusion
- C. Osmosis
- D. Active transport
4. Which statement about peripheral proteins is correct?
- A. They span the whole membrane
- B. They are attached to one surface of the bilayer
- C. They form aquaporins
- D. They are embedded in the hydrophobic core
5. Glycoproteins are involved in:
- A. Simple diffusion
- B. Cell recognition
- C. ATP synthesis
- D. Osmosis