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  4. In Calvin cycle, if one molecule of RuBP is carboxylated than how many PGA molecule will be formed?

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Q. In Calvin cycle, if one molecule of RuBP is carboxylated than how many PGA molecule will be formed?

Photosynthesis in Higher Plants

Solution:

Carboxylation of one molecule of RuBP leads to the formation of $2$ molecules of $3-PGA$.
$RuBP + CO _{2} \xrightarrow [\text { carboxylase }]{ RuBP }2$-carboxyl $3$-keto $1-5$, bisphosphoribotol
$2$-carboxyl $3$-keto $1-5$-bisphosphoribotol $+ H _{2} O \longrightarrow 2 \text { (3PGA) }$