Question

The primary acceptor of $C{O}_2$ in $C_4$ palnts is

• A. $RuBP$
• B. Phosphenol pyruvid acid
• C. $OAA$
• D. Malic acid

Answer 1

The correct option is A $RuBP$

$RuBP$ is ribulose biphosphate. Its purpose is in the dark reaction. It is formed by taking a phosphate, coming from the splitting of $ATP$, and joining it with $RuP$, changing $RuP$ (ribulose phosphate) into $RuBP$. $RuBP$ is then able to join with $C{O}_2$ and form an unstable $6C$ molecule which is the basis for the dark reaction. So the correct option is '$RuBP$'.