MDCAT · CHAPTER 4
Cell Structure & Function
Connect organelle structure with function, then follow how substances cross a selectively permeable membrane.
Your study notes
01 / LESSON
Build the explanation.
- Relate major organelles to their roles in cell metabolism.
- Distinguish diffusion, osmosis, facilitated diffusion and active transport.
- Predict water movement using water-potential reasoning.
02 / NOTES
The essentials, in one place.
- Organelles create specialised reaction environments.
- Membrane proteins produce selectivity beyond the phospholipid bilayer.
- Passive transport moves down a gradient; active transport can move against it.
- Osmosis describes water movement according to water potential.
03 / ACTIVITY
Test the idea by changing something.
Predict the result first, run the activity, then explain what changed and why.
04 / DIAGRAM
Make the connections visible.
Blocks most ions and large polar solutes.
Provides a selective hydrophilic pore.
Binds a solute and changes conformation.
Uses energy to move solutes against a gradient.
Cover the labels, redraw the sequence or comparison, and explain each connection aloud.
See diagrams in the full explanation ↗05 / QUIZ
Retrieve before you reread.
Build a timed test from this chapter’s 100 practice questions. Questions and options are shuffled; missed answers feed your revision notebook.
Original practice items, including related concept variants; not official examination questions.06 / REVISION SHEET
Take the chapter away with you.
A print-friendly sheet brings together the learning targets, key points, concept diagram, written recall prompts and applied MCQs. Add the answer key when you are ready to check.
Print / save the chapter sheet ↗