The Total solution for NCERT class 6-12
Give a comparison between the following:
(a) C3 and C4 pathways
(b) Cyclic and non-cyclic photophosphorylation
(c) Anatomy of leaf in C3 and C4 plants
a) C3 and C4 pathways
C3 Pathway
C4 Pathway
RUBP is the primary acceptor of CO2
PEP is the primary acceptor of CO2
3- Phosphoglycerate is the first stable product
Oxalo-acetic acid is the first stable product
Occurs in mesophyll cell of the leaves
Occurs in mesophyll cells and bundle sheath
Process of Carbon fixation is slower
Process of Carbon fixation is faster
b) Cyclic and non-cyclic photophosphorylation
Cyclic photophosphorylation
Non-cyclic photophosphorylation
Occurs only in photosystem-I
Occurs both in Photosystem-I and II
ATP is produced
ATP and NADPH2 are produced
Photolysis of water does not occur hence Oxygen is not produced
Phtolysis of water occurs hence Oxygen is produced
Electrons move in a closed circle
Electrons do not move in a closed circle
c) Anatomy of leaf in C3 and C4 plants
Anatomy of leaf in C3
Anatomy of leaf in C4
Do not possess Kranz anatomy.
They have Kranz anatomy
Chloroplasts are not dimorphic
Chloroplasts are dimorphic, organized centripetally. Size of bundle sheaths are larger
Mesophyll cells possess intercellular space.
Mesophyll cells do not possess intercellular space.