Anaerobic respiration and respiratory substrates Quiz
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5 questions, one answer each
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1. Which statement about glycolysis in anaerobic conditions is correct?
- A. It stops because there is no oxygen
- B. It stops because ATP is not needed
- C. It continues because NAD is regenerated when pyruvate is reduced
- D. It continues because the Krebs cycle supplies NAD
2. What is released when pyruvate is converted to ethanal in yeast?
- A. Carbon dioxide
- B. Lactate
- C. Oxygen
- D. Acetyl coenzyme A
3. Which is a respiratory substrate that enters the Krebs cycle as acetyl coenzyme A?
- A. Glycerol only
- B. A deaminated nitrogen group
- C. Fatty acids
- D. Lactate
4. What is the net ATP gain from glycolysis during anaerobic respiration?
- A. 4
- B. 2
- C. 32
- D. 0
5. In the yeast practical, 12 cm³ of CO₂ was collected in 4.0 min. What is the rate?
- A. 48 cm³ min⁻¹
- B. 0.33 cm³ min⁻¹
- C. 16 cm³ min⁻¹
- D. 3.0 cm³ min⁻¹