If light is cut and CO₂ supply is continued, then which of the following substances will get disappeared from photosynthesizing algal cells?
a) RUDP
b) PGAL
c) RUMP
d) PGA
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answer is RUDP
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Answer:
Option d) PGA.
Explanation:
If the light is cut then the Calvin or the c3 cycle stops and there is no further production of NADPH and the ATP. Since the CO is combined with the RUBP to produce the stable 3 carbon compound which is the PGA. While the PGA has no role with the CO2 which is continued or not. While after many cycles when all the ATP and the NADPH is used up and there is no light.
The c3 cycle will stops and the PGA which was producing sugar will also stop as a result there will be no sugar and no PGA.
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