Choose the correct word equation for aerobic respiration.

• Glucose → lactic acid

• Glucose + oxygen → carbon dioxide + water

• Carbon dioxide + water → glucose + oxygen

Choose the best explanation for why cells carry out respiration.

• Releases energy for processes such as movement

• It makes energy for the body to use

• Because animals are always breathing

Choose the site of most aerobic respiration in cells.

• Mitochondria

• Ribosomes

• Chloroplasts

Choose the correct word equation for photosynthesis.

• Chlorophyll + carbon dioxide → glucose + oxygen

• Glucose + oxygen → carbon dioxide + water

• Carbon dioxide + water → glucose + oxygen

Choose which reading shows an anomaly.

• Lights off, reading 3

• Lights on, reading 3

• Lights off, reading 4

Choose a possible explanation for an anomaly in this investigation.

• Only 4 readings were taken

• The timer was used incorrectly so only 1 minute was measured

• Not enough carbon dioxide left in the water after 4 readings

Choose the best description of the results when the lights were on.

• They are not precise

• They are precise

• More information is needed to decide whether these results are precise

Stomata are tiny holes on the underside of a leaf. Choose why this is a good adaptation for photosynthesis.

• They are the site of photosynthesis

• Oxygen, carbon dioxide and water vapour can pass in and out of the leaf cells

• Allows the plant to breathe

Fermentation is useful because it produces …

• glucose for nutrition.

• carbon dioxide for making food.

• oxygen to breathe.

Choose when plants respire.

• Always

• Never

• Only at night