A student investigates the temperature changes around plants. They note that germinating seeds (which only respire) cause the temperature of their surroundings to rise, whereas green leaves in sunlight (which both photosynthesise and respire) can have a cooling effect. Depending on the process, energy is either absorbed or released. Which statement correctly identifies the thermodynamic nature of photosynthesis and aerobic respiration?
Photosynthesis is an endothermic process that absorbs energy, while aerobic respiration is an exothermic process that releases energy.
Photosynthesis is an exothermic process that absorbs energy, while aerobic respiration is an endothermic process that releases energy.
Photosynthesis is an endothermic process that releases energy, while aerobic respiration is an exothermic process that absorbs energy.
Photosynthesis is an exothermic process that releases energy, while aerobic respiration is an endothermic process that absorbs energy.
16 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.