All prokaryotic and eukaryotic DNA polymerases share the same fundamental type of synthetic activity, antiparallel synthesis from 5' to 3' from a template that is 3' to 5'.

TLS Online TPP Program

#Id: 9000

#Unit 6. System Physiology – Plant

The fixation of three molecules of CO2 into one molecule of triose phosphate requires six molecules of NADPH and nine of ATP (3 CO2 : 6 NADPH : 9 ATP ≡ CO2 : 2 NADPH : 3 ATP). 

TLS Online TPP Program

#Id: 9001

#Unit 6. System Physiology – Plant

The products of the catalytic cycle are either two molecules of 3-phosphoglycerate (carboxylase activity) or one molecule each of 3-phosphoglycerate and 2-phosphoglycolate (oxygenase activity).

TLS Online TPP Program

#Id: 9002

#Unit 6. System Physiology – Plant

Prior to CO2 fixation, Activation of RUBISCO/Carbamylation of RUBISCO takes place

1. Two protons are released. 

2. Binding of CO2 molecule on NH2 group

3. Binding of Mg2+ concentration upon illumination

TLS Online TPP Program

#Id: 9003

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 9004

#Unit 6. System Physiology – Plant

CO2 functions both as an activator and as a substrate in the reaction catalyzed by rubisco.

TLS Online TPP Program

#Id: 9005

#Unit 6. System Physiology – Plant

Most of the regulation between nucleus and plastids is anterograde: products of nuclear genes control the transcription and translation of plastid genes..