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Index
»
GCSE Biology 1
»
Practicals
»
Enzyme activity
level: Enzyme activity
Questions and Answers List
level questions: Enzyme activity
Question
Answer
Device for measuring precise volumes of liquids, typically 5 cm³ in this experiment.
Equipment: Measuring Cylinder/Syringe
Tile with small depressions used to hold samples for observation, facilitating comparative analysis.
Equipment: Dimple Spotting Tile
Liquid containing starch molecules, a substrate for enzymatic activity.
Equipment: Starch Solution
Solutions with varying pH levels used to maintain constant pH conditions for enzyme activity.
Equipment: Buffer Solutions
Cylindrical containers used for mixing starch solution, buffer solutions, and amylase.
Equipment: Test Tubes
Solution containing the enzyme amylase, which catalyzes the breakdown of starch into sugars.
Equipment: Amylase Solution
Pure water used as a control to compare effects against experimental conditions.
Equipment: Distilled Water
Heating apparatus set at a constant temperature of 35°C to maintain optimal conditions for enzyme activity.
Equipment: Water Bath (35 °C)
Instrument used to measure and ensure the temperature stability of the water bath.
Thermometer
Small, narrow tubes used to transfer precise volumes of liquids, essential for sampling test tube mixtures.
Pipettes
Solution used to test for the presence of starch by forming a blue-black color complex with starch molecules.
Equipment: Iodine Solution
Device used to measure precise time intervals for sampling during the enzyme activity experiment.
Equipment: Stopwatch