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Question
Which of the following is the main product in the photorespiration of C3 plants?
Which of the following is the main product in the photorespiration of C3 plants?
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Solution
The correct option is C Glycolate
Photorespiration occurs when there is low $CO_2$, concentration but high $O_2$, concentration. The enzyme RuBP carboxylase can initiate the reversal of photosynthetic reactions. At mid-day, when temperature and $CO_2$ content are high, the affinity of RuBP carboxylase increases for $O_2$but decreases for $CO_2$. Thus, it converts RuBP to 3-carbon compound (PGA) and a 2-carbon compound (phosphoglycolate). The phosphoglycolate is converted rapidly to glycolate in the peroxisomes.
Glycolate is further converted to glycine, serine, CO2 and NH3
So the correct option is 'Glycolate'.
Photorespiration occurs when there is low $CO_2$, concentration but high $O_2$, concentration. The enzyme RuBP carboxylase can initiate the reversal of photosynthetic reactions.
At mid-day, when temperature and $CO_2$ content are high, the affinity of RuBP carboxylase increases for $O_2$but decreases for $CO_2$. Thus, it converts RuBP to 3-carbon compound (PGA) and a 2-carbon compound (phosphoglycolate). The phosphoglycolate is converted rapidly to glycolate in the peroxisomes.
Glycolate is further converted to glycine, serine, CO2 and NH3
So the correct option is 'Glycolate'.
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