Question

Rubisco has active sites for both $C{O}_2$ and $O_2$, but binding to brings down its efficiency.

• A. $C{O}_2$
• B. $H_2$
• C. $O_2$
• D. $H_{2}O$

Answer 1

The correct option is C $O_2$

RuBisco is the most abundant enzyme in nature but isn't optimized for performance like enzymes usually are. One of the chief reasons are that it has a active site that binds to both $C{O}_2$ and $O_2$. But binding to $O_2$ leads to unnecessary reaction products that decrease the enzyme efficiency.