#Question id: 10209
#Unit 6. System Physiology – Plant
Protection against photodamage is a multilevel process, excited state of chlorophyll is not rapidly quenched by photochemistry it can react with molecular oxygen to form toxic photoproducts such as as singlet oxygen (1 O2*) what can damage if this second line of defense also fails to eliminate the reactive photoproducts?
#Question id: 10210
#Unit 6. System Physiology – Plant
Some xanthophylls also participate in energy dissipation such as in light conversion of Violaxanthin to Zeaxanthin with antheraxanthin as the intermediate and vice-versa, which of the following statements is CORRECT?
a.) The conversion of Violaxanthin to Zeaxanthin a singlet oxygen is removed with the help of co-factor Ascorbate and violaxanthin de-epoxidase under high PPFD
b.) Zeaxanthin is oxidised into violaxanthin with the help of NADPH and oxygen under low PPFD
c.) Conversion of Violaxanthin to Zeaxanthin a singlet oxygen is removed with the help of NADPH and water under low PPFD
d.) Zeaxanthin is oxidised into violaxanthin in presence of enzyme known as violaxanthin de-epoxidase and co-factor Ascorbate under high PPFD
#Question id: 10211
#Unit 6. System Physiology – Plant
Which of the following mechanism is not involve in phtoprotection to plants?
#Question id: 10212
#Unit 6. System Physiology – Plant
Which of the following mechanism is not involve in phtoprotection to plants?
#Question id: 10213
#Unit 6. System Physiology – Plant
What is the reason behind that an organism cannot live or die in the presence of both light and molecular oxygen?
#Question id: 10214
#Unit 6. System Physiology – Plant
LHCII, one of the membrane-bound antenna pigment proteins, which can be phosphorylated and non-phosphorylated by a specific kinase present in thylakoid membrane. Which of the following statements are NOT TRUE ?