GCSE Biology - Respiration #21

The video tutorial explains the importance of respiration in energy transfer, focusing on cellular respiration as an exothermic reaction. It covers how organisms use energy for various functions and introduces metabolism. The tutorial distinguishes between aerobic and anaerobic respiration, highlighting the efficiency of aerobic respiration in the presence of oxygen and the inefficiencies of anaerobic respiration, which occurs without oxygen. It also discusses anaerobic respiration in plants and yeast, known as fermentation, and its industrial applications.

What is the primary role of respiration in living cells?

• To create energy from scratch

• To transfer energy from glucose

• To store energy in glucose

• To convert energy into oxygen

Which of the following is a key feature of aerobic respiration?

• It produces lactic acid

• It takes place in mitochondria

• It is less efficient than anaerobic respiration

• It occurs without oxygen

What is the word equation for aerobic respiration?

• Glucose + Water → Carbon Dioxide + Oxygen

• Glucose → Ethanol + Carbon Dioxide

• Glucose → Lactic Acid

• Glucose + Oxygen → Carbon Dioxide + Water

Why is anaerobic respiration considered less efficient than aerobic respiration?

• It results in incomplete breakdown of glucose

• It requires more oxygen

• It produces more energy

• It occurs in mitochondria

What is the main product of fermentation in yeast?

• Oxygen

• Lactic acid

• Glucose

• Ethanol