#Question id: 9585
#Section 2: General Biology
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?
#Question id: 9586
#Section 2: General Biology
The photochemical quantum efficiency (quantum yield) is nearly 100%, the energy conversion efficiency is only 27%, and the overall efficiency of conversion of solar
energy is only a few percent the solar energy storage efficiency is a measure of how much of the energy in the entire solar spectrum is converted to usable form, if it
can be measure in terms of C3 and C4 plant?
#Question id: 9587
#Section 2: General Biology
The structure of the four major protein complexes in the thylakoid membrane are organised form such as ;
a.) PSII is located predominantly in the stacked regions of the thylakoid membrane and Cytochrome b6f complexes are evenly distributed
b.) PSI and ATP synthase are found in the unstacked regions protruding into the stroma
c.) Lateral separation of the two photosystems requires that electrons and protons produced by PSII be transported directly to PSI and the ATP coupling enzyme
d.) Four main protein complexes of the thylakoid membrane, shown also are the two diffusible electron carriers—plastocyanin, which is located in the thylakoid lumen, and plastohydroquinone (PQH2) in the membrane, The lumen has a positive electrical charge with respect to the stroma
Which of the following statements correct?
#Question id: 9588
#Section 2: General Biology
The light-absorbing antenna systems are organised in different manner, which of the following statements about antenna would be Incorrect?
#Question id: 9589
#Section 2: General Biology
The physical mechanism by which excitation energy is conveyed from the chlorophyll that absorbs the light to the reaction centre, By this mechanism the excitation energy is transferred from one molecule to another by a nonradioactive process, this mechanism is known as
#Question id: 9591
#Section 2: General Biology
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?