Scenario 1- Mayfly Metabolism Energy is required by all living organisms in orde

Question

Scenario 1- Mayfly Metabolism Energy is required by all living organisms in order to su yeast will utilize carbohydrates, such as glucose or sucrose as an energy source stain cellular reactions. We know that group of students were interested in studying whether ingestion of carbohydrates would alter regenerate ATP. The byproduct of respiration is carbon dioxide (COJ). Yeast were given 20mL of water, glucose, or sucrose for 24 hours. The students then quantified metabolic activity by measuring the amount of CO2 (in ppm) produced by each yeast treatment during a 30 minute period. the metabolic activity of yeast. Aerobic respiration uses oxygen (O2) and glucose to 1. What is the independent variable? Is this variable categorical or quantitative? 2. What is the dependent variable? Is this variable categorical or quantitative? 3. What is a reasonable hypothesis for this study? 4. What is logical prediction, given the study and the hypothesis you developed? 5. Is this study an observational study or an experiment?

Explanation / Answer

1. Source of energy is the independent variable. It is a categorical variable.

2. Metabolic activity is the dependent variable. It is a quantitative variable.

3. Hypothesis : Different sugars affect the metabolic activity in yeast.

4. Amount of CO2 produced (in ppm) will be higher in sucrose containing medium than in glucose containing medium. When fed with only water, no CO2 will be produced as water does not serve as an energy source.

5. It is an observational study as the aim was to determine the effect of different carbohydrates on metabolic activity of yeast.

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