1. Which of the following lists contains only organisms that perform cellular respiration to survive?
- A. A sunflower, a mushroom, and a rock
- B. A bacterium, an oak tree, and a whale
- C. A human, a fish, and a water molecule
- D. A dormant seed, a burning candle, and a yeast cell
2. What is the primary function of cellular respiration in all living organisms?
- A. To create complex sugars using sunlight
- B. To convert food into usable energy for cell activities
- C. To remove waste products from the body
- D. To transport oxygen from the lungs to the tissues
3. A common misconception is that plants only perform photosynthesis. Why must plants also perform cellular respiration?
- A. To release the oxygen they produce into the atmosphere for animals to breathe.
- B. Because they need to break down the sugars they create to get energy for their own life functions like growth and repair.
- C. To absorb water and essential minerals from the soil through their root systems.
- D. So they have a way to get energy at night when there is no sunlight for photosynthesis.
4. If a living cell were suddenly unable to perform cellular respiration, what would be the most immediate result?
- A. It would be unable to synthesize new proteins.
- B. It would stop absorbing nutrients from its environment.
- C. It would run out of the usable energy needed for metabolic functions.
- D. It would not be able to divide and reproduce.
5. A scientist places a healthy bean plant in a sealed, completely dark room. Which process will continue to occur within the plant's cells to keep it alive for a period of time?
- A. Photosynthesis
- B. Cellular respiration
- C. Pollination
- D. Evaporation
6. Which of the following are the primary types of energy storage molecules that organisms break down during cellular respiration?
- A. Water and minerals
- B. Oxygen and carbon dioxide
- C. Glucose and fats
- D. Sunlight and heat
7. What is the primary function of cellular respiration in living organisms?
- A. To create complex energy storage molecules like glucose from simpler substances.
- B. To break down food molecules, like glucose and fats, to release usable energy for life functions.
- C. To transport oxygen from the lungs to the rest of the body's tissues.
- D. To convert light energy from the sun into chemical energy stored in biomass.
8. How does the process of cellular respiration release the energy stored within a glucose molecule?
- A. By combining it with water to dilute it.
- B. By breaking the chemical bonds within the molecule.
- C. By physically moving the molecule to the muscles.
- D. By exposing the molecule to sunlight.
9. A person feels warm after exercising. Which biological process is most directly responsible for releasing the thermal energy that increases their body temperature?
- A. Photosynthesis
- B. Digestion
- C. Cellular respiration
- D. Biomass accumulation
10. Why is simply storing fat (biomass accumulation) not enough to power an animal's daily activities like running or hunting?
- A. Fat is too heavy and would prevent the animal from moving quickly.
- B. The stored chemical energy in fat is not in a usable form until it is released by cellular respiration.
- C. Animals can only get usable energy directly from eating plants, not from their own stored fat.
- D. Storing fat requires more energy than the fat itself is able to provide later on.