TPP/UCC109 Biology
Task 3 Revision
Use your learning objectives to guide your learning, the questions are based on these.
Look at worksheets 5 - 9 and note the types of questions.
Read the ‘Tips for Biology tests’ on Blackboard under Assessment.
Cell membranes and membrane transport
1. What does the Fluid Mosaic model describe?
2. What are the roles of cholesterol in the cell membrane in animals?
3. Passive transport includes which of the following forms or characteristics?
• osmosis
• facilitated diffusion
• transport of a solute against a concentration gradient
• pinocytosis
• diffusion of a solute across a membrane
• transport of a solute down a concentration gradient
• phagocytosis
• the use of an energy source.
4. From the list below choose the characteristics of molecules that would
pass through a cell membrane most easily.
Ionic, large, hydrophobic, small, hydrophilic, polar, lipophilic
5. Define:
• phagocytosis
• pinocytosis
• exocytosis
6. Phagocytosis and pinocytosis are both forms of what membrane transport process?
7. What are the functions of the glycoproteins and glycolipids of animal cell membranes?
8. Define diffusion.
9. The digestion of meat produces high concentrations of some amino acids. The cells lining the small
intestine move the amino acids across their cell membranes through transmembrane proteins into
the cytoplasm which only have low concentrations of amino acids. Using this information, which
transport mechanism is most probably functioning in the intestinal cells to transport the amino acids
into the cells?
10. Which two names can be used to describe the proteins that transport molecules through the cell
membrane?
1
, TPP/UCC109 Biology
11. White blood cells (WBC) can track bacteria using chemotaxis (following a chemical concentration
gradient) but what process is used to finally capture and engulf them?
12. Label the components on the animal cell membrane diagram.
13. Define hydrophobic and hydrophilic and the parts of the membrane that they are
associated with.
14. The following diagram illustrates passive and active transport of solutes across a cell membrane. Indicate
which illustrates simple diffusion, facilitated diffusion, and active transport.
15. One of these uses ATP – which one? Why is ATP required and which organelle produces ATP?
Prokaryotes
16. What is the role of the capsule in prokaryotes?
17. What is the structure that enables many prokaryotes to be motile?
2
Task 3 Revision
Use your learning objectives to guide your learning, the questions are based on these.
Look at worksheets 5 - 9 and note the types of questions.
Read the ‘Tips for Biology tests’ on Blackboard under Assessment.
Cell membranes and membrane transport
1. What does the Fluid Mosaic model describe?
2. What are the roles of cholesterol in the cell membrane in animals?
3. Passive transport includes which of the following forms or characteristics?
• osmosis
• facilitated diffusion
• transport of a solute against a concentration gradient
• pinocytosis
• diffusion of a solute across a membrane
• transport of a solute down a concentration gradient
• phagocytosis
• the use of an energy source.
4. From the list below choose the characteristics of molecules that would
pass through a cell membrane most easily.
Ionic, large, hydrophobic, small, hydrophilic, polar, lipophilic
5. Define:
• phagocytosis
• pinocytosis
• exocytosis
6. Phagocytosis and pinocytosis are both forms of what membrane transport process?
7. What are the functions of the glycoproteins and glycolipids of animal cell membranes?
8. Define diffusion.
9. The digestion of meat produces high concentrations of some amino acids. The cells lining the small
intestine move the amino acids across their cell membranes through transmembrane proteins into
the cytoplasm which only have low concentrations of amino acids. Using this information, which
transport mechanism is most probably functioning in the intestinal cells to transport the amino acids
into the cells?
10. Which two names can be used to describe the proteins that transport molecules through the cell
membrane?
1
, TPP/UCC109 Biology
11. White blood cells (WBC) can track bacteria using chemotaxis (following a chemical concentration
gradient) but what process is used to finally capture and engulf them?
12. Label the components on the animal cell membrane diagram.
13. Define hydrophobic and hydrophilic and the parts of the membrane that they are
associated with.
14. The following diagram illustrates passive and active transport of solutes across a cell membrane. Indicate
which illustrates simple diffusion, facilitated diffusion, and active transport.
15. One of these uses ATP – which one? Why is ATP required and which organelle produces ATP?
Prokaryotes
16. What is the role of the capsule in prokaryotes?
17. What is the structure that enables many prokaryotes to be motile?
2
