With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

  • Option 1)

    Light saturation for CO2 fixation occurs at 10% of full sunlight

  • Option 2)

    Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate

  • Option 3)

    C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum

  • Option 4)

    Tomato is a greenhouse crop which can be grown in CO2 - enriched atmosphere for higher yield

 

Answers (2)

As discussed in

Photorespiration -

A process in plant metabolism where enzyme RuBisCO oxygenates RuBP, causing some of the energy produced by photosynthesis to be wasted.

- wherein

Oenters Calvin cycle instead of Co this results in reduced rate of photosynthesis.

 

 

 Rate of photosynthesis is C_3  plants is decreased at higher temperature due to photorespiration. 

 

 


Option 1)

Light saturation for CO2 fixation occurs at 10% of full sunlight

Incorrect option

Option 2)

Increasing atmospheric CO2 concentration upto 0.05% can enhance CO2 fixation rate

Incorrect option

Option 3)

C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum

Correct option

Option 4)

Tomato is a greenhouse crop which can be grown in CO2 - enriched atmosphere for higher yield

Incorrect option

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