AS Level Biology Paper 1 · Multiple Choice practice papers

Which row describes the pathways and mechanism of water movement through a plant?

A plant cell has a solute potential of −500 kPa and a pressure potential of 200 kPa. It is placed in a solution with a water potential of −700 kPa.
What happens?

1. A Water moves out of the cell, because the cell’s water potential is −300 kPa.
2. B Water moves into the cell, because the cell’s water potential is −500 kPa.
3. C Water moves out of the cell, because the cell’s water potential is −700 kPa.
4. D Water moves into the cell, because the cell’s water potential is −300 kPa.

An image is 23 mm long at magnification × 10000. What is the actual length in μm?

1. A 1.15 μm
2. B 2.3 μm
3. C 4.6 μm
4. D 23 μm

59 of 228 cells in a root tip are in mitosis. What is the mitotic index?

1. A 0.129
2. B 0.259
3. C 0.518
4. D 2.59

Which term is described by this statement?
“Water movement through cell walls and intercellular spaces.”

1. A mass flow
2. B respiratory quotient
3. C apoplast pathway
4. D condensation reaction

Which term is described by this statement?
“Fluid formed from plasma that surrounds cells.”

1. A tissue fluid
2. B Bohr shift
3. C ciliated epithelium
4. D speciation