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Question 14
When CO2 is added to PEP, the first stable product synthesised is
(a) pyruvate (b) glyceraldehyde-3-phosphate
(c) phosphoglycerate (d) oxaloacetate

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Solution

(d) Oxaloacetate is a four carbon compound formed in C4 cycle and is a first stable product, that is why such plants are called C4 plants.
Rest of the options are incorrect as because
(a) Pyruvate is formed in glycolysis.
(b) Glyceraldehyde-3-phosphate is also an intermediate compound of glycolysis.
(c) Phosphoglycerate is also an intermediate compound of glycolysis.


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