In light reaction, the funneling of excitation from the antenna system toward the reaction centre has been shown,

a.) The excited-state energy of pigments increases with distance from the reaction centre; that is, pigments closer to the reaction centre are lower in energy than those farther from the reaction centre

b.) The energy gradient ensures that excitation transfer toward the reaction centre is energetically favorable and that excitation transfer back out to the peripheral portions of the antenna is energetically unfavourable

c.) Some energy is lost as heat to the environment by this process, but under optimal conditions almost all the excitation energy absorbed in the antenna complexes can be delivered to the reaction centre

d.) The excited-state energy of  pigments decreases with distance from the reaction centre

Which of the following above combination is true?

#Question id: 10150

#Unit 6. System Physiology – Plant

Light controls the assembly of chloroplast enzymes into supramolecular complexes one of the enzyme such as Glyceraldehyde-3-P dehydrogenase, this enzyme acivity is dependent on

#Question id: 10151

#Unit 6. System Physiology – Plant

Light regulates the stability of the ternary complex through the ferredoxin–thioredoxin system Regulation of chloroplast phosphoribulokinase and glyceraldehyde-3-phosphate dehydrogenase. Chloroplasts contain two isoforms of glyceraldehyde3-phosphate dehydrogenases, named A4 and A2B2. Which of the following statement about isoform of glyceraldehyde3-phosphate dehydrogenases is False?

#Question id: 10152

#Unit 6. System Physiology – Plant

Rubisco catalyzes both the carboxylation and the oxygenation of ribulose 1,5-bisphosphate, the oxygenase activity of rubisco causes partial loss of the carbon fixed by the Calvin–Benson cycle, to avoid loss a reaction takes place such as photorespiration, The following statements about photorespiration.

a.) To avoid drain of carbon out of the Calvin–Benson cycle is metabolized through the C2 oxidative photosynthetic carbon cycle

b.) In photorespiration involves chloroplasts, leaf peroxisomes, and mitochondria

c.) During oxygenation process Rubisco fixes oxygen at high temperature

d.) One of the rection of the C2 cycle is Glycine converted into the serine is takes place in peroxisome

Which of following from above combination is CORRECT?

#Question id: 10153

#Unit 6. System Physiology – Plant

Which of the following statements is False?

#Question id: 10154

#Unit 6. System Physiology – Plant

The C2 oxidative photosynthetic carbon cycle on chloroplast metabolism, the functioning of the C2 oxidative photosynthetic cycle in three compartments: chloroplasts, peroxisomes and mitochondria such as;

a.) In the carbon cycle; the transfer two molecules of glycolate and recovers one molecule of glycerate and releases one molecule of CO2

b.) In the nitrogen cycle, one molecule of glutamate and recover one molecule of NH4 +

c.) In the oxygen cycle; contributes to the removal of H2O2 formed in the oxidation of glycolate by O2

i) Takes place in Peroxisome

ii) In Mitochondria

iii) In the Chloroplasts

Which of the following combination from the above statements is TRUE?

#Question id: 10155

#Unit 6. System Physiology – Plant

Which of the following components carries out oxygen cycle and also produces hydrogen per oxide ?