CIE IGCSE Biology: 复习笔记:6.1.1 Photosynthesis

CIE IGCSE Biology: 复习笔记:6.1.1 Photosynthesis




  • Green plants make the carbohydrate glucose from the raw materials carbon dioxide and water
  • At the same time oxygen is made and released as a waste product
  • The reaction requires energy which is obtained by the pigment chlorophyll trapping light from the Sun
  • So photosynthesis can be defined as the process by which plants manufacture carbohydrates from raw materials using energy from light
  • It can be summed up in the following equation:


Exam Tip

If asked for the raw materials required for photosynthesis, the answer is carbon dioxide and water.


Although required for the reaction to take place, light energy is not a substance and therefore cannot be a raw material.


Photosynthesis Word Equation


Photosynthesis word equation


How plants get the materials they need