Design an experiment to investigate the relationship between microbial count and reductase activity, using milk decolorization as the indicator. Detail your hypothesis and procedure.

let's review your answers for question 2.

a) Propose a Hypothesis for your experiment:
✅ Correct. Your hypothesis clearly links the microbial count (and thus reductase activity) to the rate of decolorization.

b) Describe your procedure:
❌ Incorrect. Your procedure is missing a critical step for testing your hypothesis.

• You state "In each test tube add a fixed volume of each milk sample". To test the effect of microbial count or concentration, you need to prepare and use different dilutions of the stale milk (or yeast suspension) in each test tube, not the same concentration. The experiment requires varying the concentration of the stale milk across the test tubes to observe its effect on decolorization time.