Grade 11 learners want to investigate which enzyme is responsible for chemical digestion of starch into glucose in humans. They are provided with two different enzymes (carbohydrase and proteases ),starch powder,warm water at about 37 and basic glass apperatus and chemicals to test for glucose.
Formulate a hypothesis for this investigation?
Identity the following variables
(a) independent variable
(b)dependent variable
(c) fixed or controlled variable
Why should the water be at about 37?
Hypothesis: The hypothesis for this investigation could be that carbohydrase enzyme is responsible for the chemical digestion of starch into glucose in humans.
Variables:
(a) Independent variable: The independent variable is the enzyme used (carbohydrase or proteases).
(b) Dependent variable: The dependent variable is the presence or absence of glucose after the digestion process.
(c) Fixed or controlled variable: The fixed or controlled variables may include the concentration of starch powder, the amount of enzyme used, the duration of the digestion process, and the temperature of the water.
Water at about 37 degrees Celsius: The reason for keeping the water at about 37 degrees Celsius is that it mimics the temperature of the human body. Enzymatic reactions, including the digestion of starch by enzymes, typically occur at an optimal temperature within the range of the human body temperature. By maintaining the water at 37 degrees Celsius, the investigation simulates the conditions of the human body and allows for more accurate observations of the enzymatic digestion process.