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DIFFERENCE BETWEEN PHOTORESPIRATION AND DARK RESPIRATION

 

Photorespiration

Dark respiration

1.

Occurs only in photosynthetic cells.

Occurs in all living cells.

2.

Its functioning involves chloroplasts, mitochondria and perioxysomes.

It takes place only in mitochondria.

3.

CO2 evolution and O2 uptake are dependent on light.

CO2 evolution and O2 uptake are independent of light.

4.

Hydrogen Peroxide (H2O2) is formed.

Hydrogen Peroxide (H2O2) is not formed

5.

The substrate involved is Glycolate.

The substrate involved is Acetyl CoA.

6.

Increases with increase in O2 concentration.

It is saturated at very low O2 concentration.

7.

Does not generate ATP.

Generates ATP.

 

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DIFFERENCE BETWEEN PHOTORESPIRATION AND DARK RESPIRATION

Photo respiration

Dark respiration

It occurs only in the photosynthetic cells.

It occurs in all types of the cells.

It takes place only in the presence of light

It does not depend on the presence or absence of light.

It takes place in chloroplast, peroxisomes and mitochondria.

It functions in mitochondria alone.

It occurs in the only in certain green plants.

It occurs in animals, plants and bacteria.

 

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