Photosynthesis in Higher Plants
Advertisement
Zigya App

RuBisCo is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RuBisCo carries out more carboxylation in C4 plants?

RuBisCo enzymes acts as both carboxylase and oxygenase. It carries out more carboxylation in the C4 plants as these plants have special mechanism that increases the concentration of the CO2 at the enzyme site. There is no photorespiration in the C4 plants and thus oxygen does not bind to the RuBisCo enzyme. All this minimizes the oxygenase activity of the enzyme and increase the carboxylase activity. 

414 Views
  • Switch
    • Advertisement

    Give comparison between the following :

    (b) Cyclic and non-cyclic photophosphorylation

     

    Answer
    By looking at a plant externally can you tell whether a plant is C3 or C4? Why and how?
    Answer
    By looking at which internal structure of a plant can you tell whether a plant is C3 or C4? Explain.
    Answer
    Even though a very few cells in a C4 plant carry out the biosynthetic – Calvin pathway, yet they are highly productive. Can you discuss why?
    Answer
    First 1 2 Last
    Advertisement