In C4 plants, the primary CO2 acceptor is

Related MCQs

• A. The atmospheric concentration of CO2 at which photosynthesis just compensation point. R. The CO2 compensation point is reached when the amount of CO2 uptake is less than that generated through respiration because the level of CO2 in the atmosphere is more than that required for achieving CO2 compensation point.
• A. Under conditions of high light intensity and limited CO2 supply, photorespiration has a useful role in protecting the plants from photo-oxidative damage. R. If enough CO2 is not available to utilize light energy for carboxylation to proceed, the excess energy may not cause damage to plants.
• In term of fixing CO2, C4 plants are .......... efficient as C3 plants.
• In sugarcane plant CO2 is fixed in malic acid, in which the enzyme that fixes CO2 is
• When amount of CO2 taken from atmosphere (in photosynthesis) becomes equal to the amount of CO2 released in atmosphere (in respiration), this is called
• Heterozygous tall plants were crossed with dwarf plants what will be the ratio of dwarf plants in the following progency ?
• . In pea plants, yellow seeds are dominant to green, If a heterozygous yellow seeded plant isCorssed with a green seeded plants, what ratio of yellow and green seeded plants, would you expect in F1 generation? AIPMT - 2007
• Match Column – I with given under Column – II ; choose the answer which gives correct combination: Column – I(Scientists) Column – II(Contributions) P. A pigment which absorbs red and far-red light (i) Cytochrome Q. Main pigment involved in transfer of electrons in (ii) PEP carboxylase photosynthesis is R. NADPH2 is generated through.... (iii) Photochrome S. Enzyme which fixes CO2 in C4 plants (iv) Photosystems
• Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because :
• The Calvin cycle proceeds in three stages 1. reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH 2. regeneration, during which the carbon dioxide acceptor ribulose – 1, 5 – biphosphate is formed 3. carboxylation, during which carbon dioxide combines with ribulose – 1, 5 - biophosphate