AQA GCSE Combined Science - Respiration

What is the main product of aerobic respiration in humans?

• Lactic acid

• Carbon dioxide

• Ethanol

• Oxygen

Which of the following is the correct word equation for aerobic respiration?

• Glucose + Oxygen → Carbon dioxide + Water + Energy

• Glucose → Lactic acid + Energy

• Glucose + Oxygen → Ethanol + Carbon dioxide + Energy

• Glucose → Ethanol + Carbon dioxide + Energy

What is the main product of anaerobic respiration in yeast?

• Lactic acid

• Carbon dioxide

• Ethanol

• Water

Which of the following is the correct word equation for anaerobic respiration in yeast?

• Glucose + Oxygen → Carbon dioxide + Water + Energy

• Glucose → Lactic acid + Energy

• Glucose + Oxygen → Ethanol + Carbon dioxide + Energy

• Glucose → Ethanol + Carbon dioxide + Energy

What happens to the respiration rate during exercise?

• It decreases

• It remains the same

• It increases

• It stops

Which of the following is a common method to measure respiration rate?

• Counting heartbeats

• Measuring blood pressure

• Counting breaths per minute

• Measuring body temperature

What is the primary purpose of respiration in cells?

• To produce oxygen

• To produce energy

• To produce glucose

• To produce water

Which of the following is a by-product of anaerobic respiration in humans?

• Carbon dioxide

• Lactic acid

• Ethanol

• Water

During vigorous exercise, why do muscles switch to anaerobic respiration?

• Because there is an excess of oxygen

• Because there is a lack of glucose

• Because there is a lack of oxygen

• Because there is an excess of carbon dioxide

Which of the following is NOT a product of aerobic respiration?

• Water

• Carbon dioxide

• Lactic acid

• Energy