Question

1. based on your results, which chemical is limiting in a reaction with 3% h₂o₂ and 20% potato juice? (a) circle the limiting factor. substrate enzyme (b) explain your answer above.

Explanation:

In an enzymatic reaction (where potato juice contains the enzyme catalase and \(H_2O_2\) is the substrate), if the concentration of the enzyme (e.g., in 20% potato juice) is relatively high compared to the substrate (\(H_2O_2\) at 3%), the substrate gets consumed first. Enzymes (like catalase in potato juice) can be reused (they are not consumed in the reaction, just facilitate it). Once the substrate (\(H_2O_2\)) is all broken down (to \(H_2O\) and \(O_2\)), the reaction stops.

Answer:

(a) substrate
(b) Enzymes (like catalase in potato juice) are not consumed in the reaction (they can act on multiple substrate molecules). The substrate (\(H_2O_2\)) is the reactant that gets used up first in the reaction with potato - juice (which has the enzyme), so it is the limiting factor.