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12 Dec 2018

1) Briefly describe the physical and mechanical processes involved in the production of yogurt.

2) What is fermented milk product? How can one tell that fermentation has occurred? What organisms are employed in the production of fermented milk products?

3) What would happen to a yogurt preparation if a 2% gelatin solution was added to it?

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Nelly StrackeLv2

14 Dec 2018

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CELL RESPIRATION LAB

Section:

Type in your answers in complete sentences, be precise and specific to earn full credit, reformat if necessary

Purpose: The purpose of this lab activity is to analyze the effect of exercise on cellular respiration

Experiment 1 Enzymes in Food

Why is cellular respiration necessary for living organisms?

Why is fermentation less effective then respiration?

List the two co-enzymes involved in cellular respiration and describe their role.

How many ATP molecules are produced in
Glycolysis	Citric Acid Cycle	Electron Transport	Fermentation

Table 1. Fermentation by Yeast

Tube	Initial Gas (mm)	Final Gas (mm)	Net Change
1% Glucose Solution
1% Sucrose Solution
1% Equal Solution
1% Splenda Solution
1% Sugar Solution

Include your hypothesis for this experiment. Be specificâ¦in other words we sure to include at least one end point you will measure to support your predictions. Natural sugar causes fermentation by producing CO2

Did you notice a difference in the rate of respiration between the sugars? Did any of the artificial sugars provide a good starting material for fermentation? Yes no artificial sugar did not provide a good starting material for fermentation as there was no change in height of gas.

Which tubes displayed evidence of anaerobic fermentation? How did you know? Due to change in gas height we can determine fermentation was occurring during to production of CO2

Hypothesize why some of the solutions were not metabolized. Research their chemical formulas.

How do the results of this experiment related to the role yeast play in baking?

Experiment 2Aerobic Respiration in Beans

How did the color of the bromothymol blue solution in each beaker change over time in each condition?

What is the mechanism driving the bromothymol blue solution color change?

What can be inferred from the color change of the bromothymol blue solution?

What evidence do you have that cellular respiration occurred in the beans? Explain your answer.

What are the controls in this experiment, and what variables do they eliminate?

If this experiment were conducted at 0 Â°C, what difference would you see in the rate of respiration? Why?

Table 2: Bromothymol Blue Color Change Over Time for Pinto Bean Trial
Time	Pre-Soaked Pinto Beans	Dry Pinto Beans	No Pinto Beans
0 min
30 min
60 min
90 min
120 min
150 min
180 min
24 hours

Table 3: Bromothymol Blue Color Change Over Time for Kidney Bean Trial
Time	Pre-Soaked Kidney Beans	Dry Kidney Beans	No Kidney Beans
0 min
30 min
60 min
90 min
120 min
150 min
180 min
24 hours

Study Guide for my Fermentation class. Please help me be sureand study the correct things for my midterm.

Define what fermentation is, discuss the history of theprocesses, and explain why we should care to studyfermentation?

A bacterium is known to produce only Lactic Acid. Name the groupof bacteria it belongs to, and outline the process that convertsGlucose to Lactic acid, naming any major intermediate products andalternate products along the way.

What is/are the difference(s) between traditional culturestarters and starters used for mass production? What are theadvantages and disadvantages of both?

What is the difference between homolactic and heterolacticfermentation? How are these processes similar? Give examples ofdifferent ferments which utilize each pathway.

Humans and microbes have evolved symbiotically over time througha process known as symbiogenesis. Bacterial fermentation to producefoods is included in this symbiotic evolution, but only recently.More than the majority of this symbiogenesis is a result ofinteractions between microbes and the human body. Give specificexamples of symbiotic relationships between microbes and our bodiesand the benefits of these relationships. Why are bacteria sucheffective coevolutionary partners?

Explain/examine the cultural significance of 3 of the fermentedproducts we have studied thus far.

In which ways is fermentation similar and different in othercultures when compared to fermentation practices utilized in theUnited States today? Explain and discuss 3 examples.

Your task is to write a complete set of instructions for abeginner with no equipment or knowledge of fermentation, describe abasic recipe and explan the tools you would need and theinformation you must know in order to complete the simple ferment.Tell why each tool or ingredient is used, provide a step by stepguide to your ferment, and reasoning behind why you decided to dowhat you did.

In American health today, we have a rise of the use ofmedications that cause the death of natural gut bacteria; this hasled to many health problems. Rises in leaky gut syndrome all theway to mental illnesses that could be linked to the insufficientpresence of healthy gut bacteria. Discuss this issue in more depthand explain how fermentation may be a solution.