Questions where students often pick the tempting wrong answer — make sure you know the right one:
Where do plants get most of their biomass from?✗ Plants get most of their mass from the soil through their roots.✓ From carbon dioxide in the air — the carbon in plant tissue comes mostly from CO2 fixed during photosynthesis.
What is produced in anaerobic respiration in human muscle cells?✗ Anaerobic respiration produces ethanol and CO2 in humans.✓ Lactic acid (lactate) and a small amount of ATP — no CO2 or water in this pathway.
Do plants only respire at night?✗ Plants only respire at night and only photosynthesise during the day.✓ No — plants respire all the time, day and night. In daylight they also photosynthesise, often faster than they respire.
What does yeast produce by anaerobic respiration?✗ Lactic acid only✓ Ethanol + carbon dioxide
Practise Bioenergetics — free games
Test yourself with these quick revision games for this topic:
