GCSE Biology Respiration

What is the primary source of energy for cellular respiration?

• Proteins

• Glucose

• Fats

• Water

What type of reaction is cellular respiration?

• Endothermic

• Exothermic

• Neutral

• Catalytic

Which of the following is NOT a use of energy in organisms?

• Building larger molecules

• Muscular contraction

• Maintaining body temperature

• Photosynthesis

What is the word equation for aerobic respiration?

• Glucose + Oxygen → Lactic Acid

• Glucose + Oxygen → Carbon Dioxide + Water

• Glucose → Ethanol + Carbon Dioxide

• Glucose → Water + Oxygen

Where does aerobic respiration primarily take place in the cell?

• Nucleus

• Ribosome

• Mitochondria

• Cytoplasm

What is the main byproduct of anaerobic respiration in humans?

• Ethanol

• Carbon Dioxide

• Lactic Acid

• Water

What is the process called when yeast converts glucose into ethanol and carbon dioxide?

• Photosynthesis

• Fermentation

• Glycolysis

• Oxidation

What is the term for the combination of all chemical processes in a living organism?

• Respiration

• Digestion

• Metabolism

• Circulation

Which of the following is a reason why anaerobic respiration is less efficient than aerobic respiration?

• It produces more energy

• It requires more oxygen

• It results in incomplete breakdown of glucose

• It occurs in the mitochondria

What is the term for the extra oxygen needed to remove lactic acid after exercise?

• Oxygen debt

• Oxygen surplus

• Oxygen reserve

• Oxygen balance