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Bundle sheath cells
In C4 plants, bundle sheath cells are rich in RuBisCO,but lack PEPcase. The CO2 released in the bundle sheath cells enters the C3 or the Calvin pathway, common to all plants. Thus, the basic pathway that results in the formation of sugars, the calvin pathway is common to the C3 and C4 plants.
Pigment-containing membranous extensions in some cyanobacteria are :
In some photoautotrophic bacteria bacteriochlorophyll and bacteriophaeophytin or bacterioviridin pigments containing membraneous extensions called chromatophores are present. These are sites of bacterial photosynthesis.
Which one of the following categories of organisms do not evolve oxygen during photosynthesis?
The first reaction in photorespiraton is
Three conditions are required for photorespiration
(a)High O2 concentration
(b)Low concentration of CO2
(c)High light intensity. During photorespiration oxygenation takes place firstly.
The synthesis of one molecule of glucose during Calvin cycle requires
Which one Cu++ containing pigment?
Carbon dioxide labelled with 14C has been used to identify the intermediate compounds in the Calvin cycle, the light in-dependent stage in photosynthesis. Which compound would be the first to contain the 14C?
Cyclic photophosphorylation produces
During photosynthesis
Photosynthesis is an oxidation reduction process where H2O is oxidized by photolysis into O2 and CO2 is reduced into carbohydrates.
Which of the following is initiating step in photosynthesis?