DP Biology (last assessment 2024)

Test builder »

Question 23M.2.HL.TZ1.a

Select a Test
Date May 2023 Marks available [Maximum mark: 5] Reference code 23M.2.HL.TZ1.a
Level HL Paper 2 Time zone TZ1
Command term Explain Question number a Adapted from N/A
a.
[Maximum mark: 5]
23M.2.HL.TZ1.a

Explain how vesicles are used by cells to move materials.

[5]

Markscheme
  1. fluidity of membranes allows vesicles to bud off membranes/fuse with membranes;
  2. materials taken into cells by endocytosis/vesicle formation;
  3. Paramecium takes in food / phagocytes engulf pathogens / another example;
  4. materials released from cells by exocytosis/by vesicle fusing with plasma membrane;
  5. neurotransmitter released at synapses / protein secretion / secretion from gland cell / another example;
  6. movement/transport of materials (inside vesicles) within cells/through the cytoplasm/between organelles/from an organelle to the (plasma)membrane/from the (plasma) membrane to an organelle;
  7. movement of proteins from the rough ER to the Golgi / another example;
Examiners report

The best answers here described endocytosis, exocytosis and the movement of vesicles within cells. Common misconceptions were that vesicles pass out through membranes and can then go on to move materials from one part of the body to another.

Syllabus sections