CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Oxygen liberated during photosynthesis comes from


A
Water
loader
B
Chlorophyll
loader
C
Carbon dioxide
loader
D
Glucose
loader

Solution

The correct option is A Water
Hint: Water is the source of electrons and hydrogen ions during photosynthesis.

Part 1 - Definition - Photosynthesis
  • Photosynthesis is the process of preparing food in the presence of sunlight and chlorophyll. 
  • In this process, the plant uses water from the soil, carbon dioxide from the air and energy from sunlight to prepare glucose.
  $$Carbon$$ $$dioxide$$ + $$Water$$ + $$light$$ $$energy$$ $$\rightarrow$$ $$Glucose$$ + $$Oxygen$$

Part 2 - Role of water as Electron Feeder
  • During the light reaction of photosynthesis, when chlorophyll molecules absorb light their electrons get excited and leave the chlorophyll molecule to enter an electron transport system. In the end, these electrons are absorbed by $$NADPH^+$$.
  • To replace those electrons lost from chlorophyll, water molecule undergo photolysis.
  • The reaction proceeds as follows:
 $$H_2O$$  $$\rightarrow$$  $$2H^+$$   +  $$2e^-$$   +  $$1/2O_2$$
  • So, water provides electrons to replace those removed from chlorophyll.

Part 3 - Role of water as Oxygen Provider
  • During the photolysis of water, oxygen is released as a side product.
  • This oxygen is released into the environment through stomata.

Part 4 - Conclusion
  • From the above discussion, we can conclude that water serves as a source of protons and electrons during photosynthesis, while oxygen is released as a waste product.

Final step- Oxygen liberated during photosynthesis comes from water.

Biology

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image