#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 ?
#Question id: 10215
#Unit 6. System Physiology – Plant
Chloroplast movement is widespread among algae, mosses, and leaves of higher plants, what will be the orientation of chloroplast in dark as well as in light?
a.) In dark, chloroplasts gather at the cell surfaces parallel to the plane of the leaf so that they are aligned perpendicularly to the incident light
b.) Under high light, , the chloroplasts move to the cell surfaces that are parallel to the incident light, thus avoiding excess absorption of light
c.) the orientation of the chloroplasts in the dark is such that maximizes absorption of light
d.) the orientation of the chloroplasts in the high light is such that maximizes absorption of light
Which of the following statements is correct?