TLS Online TPP Program

#Question id: 9585


In light reaction the reaction centre of PSII  receives electron from water molecules by splitting into oxygen, If 5 oxygen molecules evolved per 50 quanta was

absorbed then what is the quantum yield?

#Unit 6. System Physiology – Plant
  1. 0.01        
  2. 0.001
  3. 0.1      
  4. 0.25
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TLS Online TPP Program

#Question id: 10143

#Unit 6. System Physiology – Plant

In the carbon assimilation reaction of photosynthesis, the biosynthesis of 1 molecules of glucose from the 6 molecules of carbon dioxide requires;

TLS Online TPP Program

#Question id: 10144

#Unit 6. System Physiology – Plant

Choose the incorrect statements about photosynthesis dark reaction ?

TLS Online TPP Program

#Question id: 10145

#Unit 6. System Physiology – Plant

The transfer of a phosphoryl group to 3-phosphoglycerate, yielding formation of 1,3-bisphosphoglycerate is catalyze by

TLS Online TPP Program

#Question id: 10146

#Unit 6. System Physiology – Plant

Light-dependent ion movements modulate enzymes of the Calvin–Benson cycle such as : rubisco, fructose 1,6-bisphosphatase, sedoheptulose 1,7-bisphosphatase, and phosphoribulokinase what will happen Upon illumination;

TLS Online TPP Program

#Question id: 10147

#Unit 6. System Physiology – Plant

Which of the following enzymes is regulated by supramolecular assembly ?

TLS Online TPP Program

#Question id: 10148

#Unit 6. System Physiology – Plant

How light controls the assembly of chloroplast enzymes into supramolecular complexes?

a.) Light regulates the stability of the ternary complex through the ferredoxin–thioredoxin system

b.) Reduced thioredoxin cleaves the disulfide bonds of both phosphoribulokinase and CP12, releasing glyceraldehyde-3-phosphate dehydrogenase and phosphoribulokinase in the catalytically active conformations

c.) Oxidised thioredoxin cleaves the disulfide bonds of both phosphoglyceratekinase and CP12, releasing glyceraldehyde-3-phosphate dehydrogenase and phosphoglyceratekinase in the catalytically active conformations

d.) thioredoxin system oxidised the disulfide bonds and reduces the assembly of between chloroplast enzymes and CP12 and converted into the catalytically active conformations

Which of the following statement is correct?