Question

Which of the following statements is true about the process shown below?
Food + oxygen $\to$ carbon dioxide + water + energy

• A. It is caused by the decay of organic substances
• B. It is an important process in the nitrogen cycle
• C. It is carried out by green plants and certain bacteria
• D. It is an essential process in living organism to provide energy and in maintaining the balance between oxygen and carbon dioxide in the atmosphere

Answer 1

The correct option is D It is an essential process in living organism to provide energy and in maintaining the balance between oxygen and carbon dioxide in the atmosphere

The given process is an essential process in maintaining the balance between oxygen and carbon dioxide in the atmosphere. Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the sun, into chemical energy that can be later released to fuel the organisms' activities. This chemical energy is stored in carbohydrate molecule, such as sugars, which are synthesized from carbon dioxide and water hence the name photosynthesis and it uses carbon dioxide which is produced during cellular respiration.

6CO${}_2$+6H${}_2$O→C${}_6$H${}_{12}$O${}_6$ +6O${}_2$