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Bromelain protease activity – Biology Lab Techniques

This experiment investigates the properties of bromelain, an enzyme contained in pineapples. Bromelain will break down the gelatin proteins into its amino acid components, hence preventing it from setting. Collect the fresh and canned pineapple samples from the fridge and the freezer and place them into clearly labelled Petri dishes. Cut each sample into 5 […]

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Plasmolysis in Onion Epidermal Cells – Biology Lab Techniques

First, cut a white onion into 4 to 6 sections. Onion is an ideal model organism to study plasmolysys because its epidermis is easy to peel off and quite resistant. Pick the third leaf from the outside, as it usually shows the best compromise between tissue maturity and integrity. Cut 5mm-wide square sections with a […]

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