Please help with this assignment. EXERCISE 8: LAB REPORT Respiration and Ferment

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Please help with this assignment.

EXERCISE 8: LAB REPORT Respiration and Fermentation Name: Date: 1. Why is yeast used in this experiment? 2. Was any gas released in the flask with boiled yeast mixture? Explain 3. What energy rich compound has been broken down to allow the yeast cells to survive and what are the resulting products? 4. Why is phenolphthalein used? Why did the flask with phenolphthalein and NaOH change color when the gas formed during respiration was passed through the solution? What, in the breath you exhaled into the beaker, caused the solution to become acidic and go from pink to clear? 5. Exercise 8 ] Respiration and Fermentation: Lab Report

Explanation / Answer

1. yeast grows in anerobic condition.

2. CO2 released when flask is boiled in yeast mixture.

3. Grows in carbohydrates rich food.(Maltose, Sucrose)

4. To determine the amount of CO2 was produced by the organisms.

5. CO2 react with phenolphthalein color turns pink in basic solutions.

6. Grow with out oxygen. Fermentation

7. Yes, there is a difference in amount of gas produced. The temperature at 35-40oC it has maximum capacity of fermentation. So, the gas production is high compared to room temperature.

8. Alcohol or Ethanol, dough formation

9. Ethanol manufacturing unit

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