Biochemistry Multiple Choice Questions on “Solute Transport across Membranes”.
1. Erythrocyte glucose transporter is an example of ____________
A. Ion driven active transport
B. Facilitated diffusion
C. Active transport
D. Simple diffusion
Answer: B
Clarification: Transportation is facilitated by carrier proteins.
2. Which out of the following is not mediated transport?
A. Facilitated diffusion
B. Primary active transport
C. Secondary active transport
D. Simple diffusion
Answer: D
Clarification: Simple diffusion is not mediated transport.
3. Na+ glucose transporter is an example of ____________
A. Symport
B. Antiport
C. Facilitated diffusion
D. ATP driven active transport
Answer: A
Clarification: Substrates are moved in the same direction across the membrane.
4. Which of the following is energy independent?
A. Active transport
B. Primary active transport
C. Secondary active transport
D. Passive transport
Answer: D
Clarification: Active transport is ATP dependent.
5. Semipermeable membrane allows ____________
A. Solute to pass
B. Solution to pass
C. Solvent to pass
D. Proteins to pass
Answer: C
Clarification: Semipermeable membrane allows solvent to pass.
6. When does saturation occur?
A. When molecules are moved by the use of vesicles
B. When the energy from a high-energy bond is required to move molecules
C. When a group of carrier proteins is operating at its maximum rate
D. When a carrier molecule has the ability to transport only one molecule or a group of closely related molecules
Answer: C
Clarification: When a group of carrier proteins is operating at its maximum rate saturation occurs.
7. In which of the following means of transport a cell expels large molecules out of it?
A. Phagocytosis
B. Exocytosis
C. Endocytosis
D. Diffusion
Answer: B
Clarification: In exocytosis, a cell expels large molecules out of it.
8. HCO3– – Cl– transporter is an example of ____________
A. Uniport
B. Antiport
C. Symport
D. Facilitated diffusion
Answer: B
Clarification: Substrates are moved in the opposite direction.
9. Which of the following transports only one kind of substrate?
A. Uniport carriers
B. Symport carriers
C. Antiport carriers
D. Membrane proteins
Answer: A
Clarification: Symport carriers move two or more substrates in the same direction across the membrane.
Antiport carriers move substrates in the opposite direction.
10. Which of the following induces conformational change in protein?
A. Uniport
B. Symport
C. Antiport
D. Facilitated diffusion
Answer: D
Clarification: Facilitated diffusion induces a conformational change in protein.
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