#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?
#Question id: 9592
#Section 2: General Biology
The function of light is to excite a specialized chlorophyll in the reaction centre either by Direct absorption or more frequently, via energy transfer from an antenna pigment, This excitation process can be envisioned as
a.) An electron from the lowest-energy filled orbital of the chlorophyll to the highest-energy unfilled orbital
b.) An electron in the upper orbital is only tightly bound to the chlorophyll and is difficult to fetch the electron nearby molecules
c.) The electron in the upper orbital is only loosely bound to the chlorophyll and is easily lost if a molecule that can accept the electron is nearby
d.) The promotion of an electron from the highest-energy filled orbital of the chlorophyll to the lowest-energy unfilled orbital
Which combination is CORRECT?
#Question id: 9594
#Section 2: General Biology
The first reaction that converts electron energy into chemical energy—What will happened in the primary photochemical event—
#Question id: 9595
#Section 2: General Biology
The process is that the absorbed photon causes an electron rearrangement in the reaction centre chlorophyll, followed by an electron transfer process in which part of the energy in the photon is captured in the form of
#Question id: 9597
#Section 2: General Biology
The reaction centre bacteriochlorophyll from purple photosynthetic bacteria was similarly identified as-