Electron delocalisation extends throughout the cyclic tetrapyrrole ring of porphyrins and gives rise to an intense transition at 400 nm called the Soret band.

TLS Online TPP Program

#Id: 3430

#Unit 6. System Physiology – Plant

Triplet states generally have much longer lives (take longer to de‐excite) than singlet states and are at a lower energy level.

TLS Online TPP Program

#Id: 3431

#Unit 6. System Physiology – Plant

Absorption of blue or red light causes the chlorophyll molecule to convert into an excited state, with blue light absorption resulting in a higher excited state because of the greater energy of blue light relative to red light.

TLS Online TPP Program

#Id: 3449

#Unit 6. System Physiology – Plant

DCMU, an inhibitor of PSII

DBMIB, an inhibitor of the Cyt b6 f complex

Paraquat (methyl viologen), an inhibitor of PSI

TLS Online TPP Program

#Id: 3541

#Unit 6. System Physiology – Plant

Three phases of the Calvin–Benson cycle: carboxylation, reduction, and regeneration

TLS Online TPP Program

#Id: 3562

#Unit 6. System Physiology – Plant

Carbon–carbon bond between C2 and C3 of the RuBP is cleaved for CO2 fixation.

TLS Online TPP Program

#Id: 3570

#Unit 6. System Physiology – Plant

Five pivotal enzymes are activated within minutes of the light–dark transition
a) Rubisco- C
b) NADP:glyceraldehyde-3-phosphate dehydrogenase-RD
c) Fructose-1,6-bisphosphatase-RG
d) Sedoheptulose-1,7-bisphosphatase-RG
e) Ribulose-5-phosphate kinase

f) Phosphoribulokinase-RG