Practise MYP Biology questions on 1.4 Osmosis and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
In terms of molecular concentration, why does water move towards a solution with a high solute concentration during osmosis?
The cell membrane is described as a 'passive' sieve during osmosis. What does the term 'passive' specifically imply in this context?
True or False: In a hypertonic solution, the plant cell membrane pulls away from the cell wall in a process called plasmolysis.
True or False: Osmosis is the movement of water molecules only, so proteins and glucose do not pass through the membrane during osmosis regardless of their size.
What is the fundamental cause of a plant wilting when it experiences severe dehydration?
The membrane attracts solute particles more than water molecules
High solute concentration corresponds to a high water concentration
High solute concentration corresponds to a low water concentration
Solute particles push the water molecules across the membrane
The membrane uses energy to pull water through the pores
The membrane changes its pore size depending on the concentration
The membrane only allows molecules to move against their concentration gradient
The membrane allows water to pass through without the cell expending energy
True
False
True
False
The plant's cells burst because the soil becomes hypotonic
Turgor pressure decreases as water moves out of the vacuoles
The cell wall dissolves due to lack of water
The plant consumes its own vacuoles for energy
