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

TLS Online TPP Program

#Question id: 28077

#Unit 6. System Physiology – Plant

The catalytic site for water oxidation in lumen is a

TLS Online TPP Program

#Question id: 28078

#Unit 6. System Physiology – Plant

Chlorophyll functions on the phenomenon of absorption of light and shows excitation of electron

(a) Chlorophyll absorbs blue or red light 

(b) blue light absorption resulting in a higher excited state 

(c) red light absorption resulting in a higher excited state 

(d) From IInd exited state returning ground state heat will be observed from blue and fluorescence from red light

Which of the following is incorrect

TLS Online TPP Program

#Question id: 28079

#Unit 6. System Physiology – Plant

In molecules, two types of excited states can exist singlet and triplet  

(a) The singlet state is relatively long‐lived than triplet and have parallel spin

(b) The singlet state is relatively short‐lived than triplet and have antiparallel spin

(c) The triplet state is relatively long‐lived than singlet and have two parallel spin

(d) The triplet state is relatively long‐lived than singlet and have two anti-parallel spin

Which of the following is correct 

TLS Online TPP Program

#Question id: 28080

#Unit 6. System Physiology – Plant

Excitation of chlorophyll RC has various ways to dissipate energy, which of the following is not a way to dissipate energy 

a. Heat

b. Fluorescence

b. energy transfer

d. Photochemistry via charge separation

Which of the following is correct 

TLS Online TPP Program

#Question id: 28081

#Unit 6. System Physiology – Plant

In the phenomenon of transfer of electron in photosystem have various time order

(a) Splitting of H2O – 1ms

(b) Transfer of electron from Mn – Z – in Microseconds 

(c) Transfer of electron from Z – P680 – in Nanosecond 

(d) 1st photochemistry - picoseconds

Which of the following is correct

TLS Online TPP Program

#Question id: 28082

#Unit 6. System Physiology – Plant

Which of the following functions as a water‐plastoquinone oxidoreductase