Lesson Worksheet: Active Transport Biology

In this worksheet, we will practice describing different examples of active transport processes that occur across the cell membrane.

Q1:

Which membrane component is required to transport both sodium and potassium ions across the cell membrane against their concentration gradients?

  • APhospholipid
  • BExtrinsic protein
  • CGlycolipid
  • DChannel protein
  • ECarrier protein

Q2:

Different mechanisms exist for transporting materials across membranes.

Which of the following processes are the reverse of each other?

  • AEndocytosis and pinocytosis
  • BEndocytosis and phagocytosis
  • CPhagocytosis and pinocytosis
  • DExocytosis and endocytosis

Which of the given processes require energy?

  • Exocytosis
  • Phagocytosis
  • Pinocytosis
  • APhagocytosis only
  • BNone of them
  • CPhagocytosis and pinocytosis
  • DExocytosis only
  • EAll of them

Q3:

The figure shows the events that occur during active transport.

Substance X remains bound to the protein, causing a conformational change.

What is X?

  • AADP
  • BPhosphate
  • CGlucose
  • DATP

What chemical reaction transfers the energy for active transport?

  • AATP ADP + Pi
  • BADP ATP + Pi
  • CATP + Pi ADP
  • DADP + Pi ATP

Q4:

The figure below shows a sodium–potassium pump.

What is the correct sequence of events that happen next?

  • AY W V Z X
  • BV X Y Z W
  • CX Z W V Y
  • DY Z W V X
  • EW V X Y Z

Q5:

The figure shows three different transport systems.

Which transport system is responsible for active glucose uptake in the brush border of the ileum?

  • ASymport
  • BUniport
  • CAntiport

Q6:

Complete the following: In active transport, substances move their concentration gradient across a membrane, from a region of concentration to a region of concentration.

  • Aagainst, high, low
  • Bdown, low, high
  • Cagainst, low, high
  • Ddown, high, low

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