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Boss quiz

10 questions on the whole topic. You get one try at each.

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  1. What is respiration?

    • The way plants make food using light
    • Breaking food into small molecules in the gut
    • Moving air into and out of the lungs
    • A chemical reaction in cells that releases energy

  2. Where in a cell does aerobic respiration happen?

    • In the nucleus
    • In the cell membrane
    • In the mitochondria
    • In the vacuole

  3. Which word equation shows aerobic respiration?

    • glucose → lactic acid
    • carbon dioxide + water → glucose + oxygen
    • glucose + carbon dioxide → oxygen + water
    • glucose + oxygen → carbon dioxide + water

  4. Which of these does not respire?

    • An oak tree
    • A pebble
    • A sleeping cat
    • A yeast cell

  5. What do muscle cells make when they respire anaerobically?

    • Ethanol
    • Lactic acid
    • Oxygen
    • Glucose

  6. Why do you keep breathing hard for a while after a sprint?

    • Extra oxygen is needed to break down lactic acid
    • The muscles have stopped respiring
    • Breathing fast cools the lungs down
    • The lungs have filled up with glucose

  7. What does yeast make in fermentation?

    • Ethanol and oxygen
    • Ethanol and carbon dioxide
    • Glucose and oxygen
    • Lactic acid and water

  8. What makes bread dough rise?

    • Air blown in by the baker
    • Bubbles of oxygen from the yeast
    • Lactic acid from the flour
    • Bubbles of carbon dioxide from the yeast

  9. Which statement is true of both aerobic and anaerobic respiration?

    • Both release energy from glucose
    • Both make water
    • Both make lactic acid
    • Both need oxygen

  10. Which releases the most energy from one glucose molecule?

    • They all release the same amount
    • Aerobic respiration
    • Fermentation in yeast
    • Anaerobic respiration in muscles
Answers
  1. A chemical reaction in cells that releases energy. Respiration releases energy from glucose in every living cell.
  2. In the mitochondria. Mitochondria release energy by aerobic respiration.
  3. glucose + oxygen → carbon dioxide + water. Glucose and oxygen are the reactants. Carbon dioxide and water are the products.
  4. A pebble. Every living thing respires. A pebble is not alive.
  5. Lactic acid. In muscles, anaerobic respiration turns glucose into lactic acid.
  6. Extra oxygen is needed to break down lactic acid. The extra oxygen is called the oxygen debt.
  7. Ethanol and carbon dioxide. glucose → ethanol + carbon dioxide
  8. Bubbles of carbon dioxide from the yeast. Yeast ferments sugar in the dough. The carbon dioxide gets trapped as bubbles.
  9. Both release energy from glucose. Both break down glucose to release energy. Only aerobic respiration needs oxygen.
  10. Aerobic respiration. With oxygen, the glucose is broken down completely, so much more energy is released.