Our IBDP 1 biology students recently conducted a fascinating investigation into the catalytic properties of enzymes, focusing on catalase extracted from celery leaves. Catalase, a common enzyme found in living organisms, plays a crucial role in breaking down hydrogen peroxide—a potentially harmful by-product of cellular metabolism—into water and oxygen.
Using the floating disc method, students explored how varying concentrations of catalase affect the rate of this decomposition reaction. In this experiment, paper discs soaked in catalase solutions were introduced into test tubes containing hydrogen peroxide. The time taken for the discs to rise to the surface—propelled by the oxygen bubbles released during the reaction—served as an indicator of enzyme activity.
Through this hands-on activity, students not only deepened their understanding of enzyme kinetics but also honed essential scientific skills such as data collection, analysis, and evaluation. The investigation highlighted the importance of enzymes in biochemical reactions and provided valuable insights into the relationship between enzyme concentration and reaction rate.
This experiment exemplifies the inquiry-based learning approach that encourages students to connect theoretical knowledge with practical applications, fostering a deeper appreciation for the intricacies of biology.