Which characteristics of living things are demonstrated by phototropism?

• 1 and 2

• 1 and 4

• 2 and 3

• 3 and 4

What is osmosis?

• the diffusion of sugar molecules from a concentrated solution to a dilute solution through a partially permeable membrane

• the diffusion of sugar molecules from a dilute solution to a concentrated solution through a partially permeable membrane

• the diffusion of water molecules from a concentrated solution to a dilute solution through a partially permeable membrane

• the diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane

A colourless liquid gives the test results shown.

Which nutrients are in the colourless liquid?

• protein, reducing sugar and starch

• protein and reducing sugar only

• protein and starch only

• protein only

Which type of molecule are enzymes?

• carbohydrate

• fat

• protein

• starch

Which row shows the correct raw materials and products of photosynthesis?

• A

• B

• C

• D

Which row provides the greatest amount of the nutrient needed to move food through the alimentary canal?

• A

• B

• C

• D

The rates of water uptake and loss are measured in four leaves.

The results are shown in the table. Which leaf is least likely to wilt?

• A

• B

• C

• D

Which statement about isotopes of the same element is correct?

• They have the same number of protons but different number of electrons

• They have the same number of protons but different number of neutrons.

• They have the same number of neutrons but different number of electrons.

• They have the same number of neutrons but different number of protons.

When dilute sodium hydroxide is added to aqueous iron(II) sulfate, insoluble iron(II) hydroxide and aqueous sodium sulfate are formed.

What is the ionic equation for this reaction?

• A

• B

• C

• D

Concentrated aqueous sodium chloride is electrolysed using inert electrodes.

Which row describes how the number of sodium ions and the number of chloride ions changes during the electrolysis?

• A

• B

• C

• D