CAIE A-Level Biology AS 4.2 Movement Into and Out of Cells Questions

The statements describe some events in the process of exocytosis of glycoprotein molecules.
1 Membrane of the Golgi body folds around glycoprotein molecules.
2 Vesicle binds to and fuses with the cell surface membrane.
3 Vesicle attached to microtubules moves through the cytoplasm.
4 Secretory vesicle forms.
What is the correct order of events for exocytosis?

Visking tubing is often used as a model during experiments to investigate osmosis in plants.

What could Visking tubing be used to represent?

A student was asked to calculate the surface area: volume ratio for an agar cube with a side length of 5.5 mm .

Which surface area: volume ratio is correct?

A red indicator solution was mixed with agar, and the resulting solid was cut into small cuboid blocks. The blocks were placed in an acid which turns the indicator yellow, and all other variables were kept constant. The dimensions of the three blocks used are shown.
block $1 \quad 3 \mathrm{~mm} \times 3 \mathrm{~mm} \times 3 \mathrm{~mm}$
block $2 \quad 8 \mathrm{~mm} \times 8 \mathrm{~mm} \times 8 \mathrm{~mm}$
block $3 \quad 11 \mathrm{~mm} \times 11 \mathrm{~mm} \times 11 \mathrm{~mm}$
Which row shows the correct surface area (SA) to volume (V) ratio for each block, and the time taken for the block to turn yellow?

Four cylinders that were identical in size, A, B, C and D, were cut from potatoes that had been stored for different lengths of time.

The cylinders were weighed, immersed in 10% salt solution for 45 minutes and then reweighed.
The percentage change in mass was then calculated.
Which cylinder had a water potential similar to the 10 % salt solution?

The electron micrograph shows some human blood cells.

Which row correctly shows the net movement of water by osmosis and the water potential of the cytoplasm of cell X compared with the solution surrounding the cells?