Sure! Here are ten sample questions related to cellular respiration that could be found in WAEC, WASSCE, GCE, or NECO examinations, along with their answers.
Questions and Answers on Cellular Respiration
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Question 1: What is the primary purpose of cellular respiration in living organisms?
- A) To produce oxygen
- B) To synthesize proteins
- C) To convert glucose into energy
- D) To remove waste products
Answer: C) To convert glucose into energy
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Question 2: Which of the following reactions represents aerobic respiration?
- A) C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + ATP
- B) C₆H₁₂O₆ + 2 ATP → 2 C₂H₅OH + 2 CO₂
- C) C₆H₁₂O₆ + 4 ATP → 2 ATP + lactic acid
- D) C₆H₁₂O₆ + 2 O₂ → 2 H₂O + 2 CO₂ + energy
Answer: A) C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + ATP
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Question 3: During glycolysis, how many molecules of ATP are produced from one molecule of glucose?
- A) 2
- B) 4
- C) 36
- D) 38
Answer: B) 4 (Net gain is 2 ATP)
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Question 4: What are the end products of anaerobic respiration in yeast?
- A) Lactic acid and ATP
- B) Glucose and oxygen
- C) Ethanol, carbon dioxide, and ATP
- D) Pyruvate and NADH
Answer: C) Ethanol, carbon dioxide, and ATP
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Question 5: In cellular respiration, what role does oxygen play?
- A) It is a product of glycolysis.
- B) It acts as an electron acceptor in the electron transport chain.
- C) It is involved in the conversion of glucose to pyruvate.
- D) It synthesizes ATP directly.
Answer: B) It acts as an electron acceptor in the electron transport chain.
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Question 6: Which of the following is NOT a stage of aerobic respiration?
- A) Glycolysis
- B) Krebs cycle
- C) Fermentation
- D) Electron transport chain
Answer: C) Fermentation
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Question 7: Which molecule is primarily produced during the Krebs cycle?
- A) Lactic acid
- B) Carbon dioxide
- C) Ethanol
- D) Acetyl-CoA
Answer: B) Carbon dioxide
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Question 8: What is the net gain of ATP molecules during the complete breakdown of one molecule of glucose through aerobic respiration?
- A) 2
- B) 18
- C) 30-32
- D) 36
Answer: C) 30-32
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Question 9: The process of breaking down glucose in the absence of oxygen is called:
- A) Aerobic respiration
- B) Anaerobic respiration
- C) Photosynthesis
- D) Oxidative phosphorylation
Answer: B) Anaerobic respiration
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Question 10: Which of the following is a characteristic of cellular respiration?
- A) It only occurs in plants.
- B) It requires sunlight.
- C) It produces ATP.
- D) It is a process that can only occur in the presence of carbon dioxide.
Answer: C) It produces ATP.
These questions provide a sample that tests knowledge and understanding of cellular respiration, a key topic in senior secondary school biology.
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