NEETBotanyPhotosynthesis in Higher Plants
What was the first stable product of CO2 fixation in another group of plants discovered by scientists?
Options
- A3-phosphoglyceric acid
- BRibulose bisphosphate
- COxaloacetic acid
- DFructose
Correct answer
C. Oxaloacetic acid
Step-by-step solution
Let us now ask ourselves a question that was asked by the scientists who were struggling to understand the ‘dark reaction’. How many carbon atoms would a molecule have which after accepting (fixing) CO2 , would have 3 carbons (of PGA)? The studies very unexpectedly showed that the acceptor molecule was a 5-carbon ketose sugar – ribulose bisphosphate (RuBP). Did any of you think of this possibility? Do not worry;Scientists also tried to know whether all plants have PGA as the first product of CO2 fixation, or whethe