GCSE CELLS

Which part of the cell is partially permeable?

• A

• B

• C

• D

In the pancreas, there are groups of cells that make insulin. What describes these cells?

• an organ in an organism

• an organ system in an organism

• cells within a cell wall

• tissues in an organ

In an osmosis experiment, four potato strips, each 5 cm in length, were left in salt solutions of different concentrations. The table shows the lengths of the strips after 30 minutes. Which salt solution was the most concentrated?

• A

• B

• C

• D

In which direction will most water molecules move?

• from X to Y, against their concentration gradient

• from X to Y, down their concentration gradient

• from Y to X, against their concentration gradient

• from Y to X, down their concentration gradient

Some red blood cells were placed in distilled water and others were placed in three salt solutions of different concentrations. Which diagram shows the appearance of a cell has changed after being in the distilled water for a short time?

• A

• B

• C

• D

The dots represent molecules of a gas in four tubes. In which tube do more molecules move from X to Y than in the opposite direction?

• A

• B

• C

• D

Using the diagram work out the concentration of sugar in solution X?

• 10%

• 20%

• 30%

• 40%

Which type of transport requires energy and moves substances against the concentration gradient?

• Diffusion

• Osmosis

• Active Transport

• None of the above

Cells that carry out a lot of active transport will need a lot of...

• Cytoplasm

• Ribosomes

• Chloroplasts

• Mitochondria

Which of the following would NOT increase the speed of diffusion?

• High surface area to volume ratio

• A large diffusion distance

• moisture

• high temperatures