Respiration Quiz
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5 questions, one answer each
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1. What is the word equation for aerobic respiration?
- A. glucose + oxygen → carbon dioxide + water
- B. glucose → lactic acid
- C. glucose → ethanol + carbon dioxide
- D. glucose + oxygen → lactic acid + water
2. Which organelle is the main site of aerobic respiration in eukaryotic cells?
- A. Ribosome
- B. Mitochondrion
- C. Chloroplast
- D. Nucleus
3. A student investigates respiration rate in germinating seeds by measuring oxygen consumption. Over 10 minutes at 25°C, the seeds consumed 12 cm³ of oxygen. When the same mass of seeds is tested at 35°C, they consume 18 cm³ of oxygen in 10 minutes. What is the best explanation for this increase?
- A. Higher temperature increases enzyme activity, so respiration rate increases
- B. Higher temperature changes the products of respiration
- C. Higher temperature reduces the need for ATP synthesis
- D. Higher temperature causes anaerobic respiration in the seeds
4. During intense exercise, a person's heart rate increases from 70 bpm to 150 bpm, and breathing rate increases from 12 breaths per minute to 30 breaths per minute. Which of the following best explains why both of these changes occur?
- A. To increase oxygen delivery to muscles and remove carbon dioxide produced by increased aerobic respiration
- B. To switch from aerobic to anaerobic respiration in the muscles
- C. To decrease body temperature and prevent overheating
- D. To increase glucose storage in the liver for later use
5. A student compares the energy released from complete aerobic respiration of one glucose molecule with the energy from anaerobic respiration of one glucose molecule in an animal. Which statement is correct, and why?
- A. Anaerobic respiration releases more energy because it produces lactic acid, which stores additional energy
- B. Aerobic respiration releases more energy because oxygen is the final electron acceptor and the glucose is completely oxidised
- C. Both release the same energy because they both start with glucose
- D. Anaerobic respiration releases more energy because it happens faster in muscles