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1- Interpreting Data. Which materials were the best at digesting the egg white? What observations enabeled you to determinate this?

The pepsin and the hydrochloric acid are together.

2- Inferring. Is the chemical digestion of protein in food a fast or slow reaction? Explain.

It is a slow reaction, because they were no immediate reaction.

3- Controlling Variables. Why was it important that the cubes of egg white all be the same size?

To get  best quality and get the same conditions.

4-Drawing Conclusions. What did the lab show about the ability of pepsin to digest protein?

It works better without acid.

5- Communicating. Write a paragraph in which you describe the purpose of test tube A and test tube C as they relate the steps you followed in the procedure.

We want to see the influence of pepsin on protein digestion.

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7) Design an experiment. (Follow the instructions in the document. Propose a title for your experiment. What problem do you want to solve? What variable will you change? Remember to change only one variable

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7) Design an experiment. (Follow the instructions in the document. Propose a title for your experiment. What problem do you want to solve? What variable will you change? Remember to change only one variable

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The title→ The Digestion investigation.

Hypothesis→ we put a smaller pieces in the digestion works better.

Procedure→ In the tube a we put the biggest piece of egg while and in a tube b we put a lot of little pieces of the same size but cut.

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8) Copy the graph from page 3 of this document into your lab report. Copy the questions and answer.

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8) Copy the graph from page 3 of this document into your lab report. Copy the questions and answer.

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1- Represent the percentage of the egg.

2- 14 hours.

3- 70%.

4- From 12h to 16h.

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1 Interpreting Data. Which materials were the best at digesting the egg white? What observations enabeled you to determinate this?

The pepsin and  hydrochloric acid together.

2 Inferring. Is the chemical digestion of protein in food a fast or slow reaction? Explain.

Its a slow reaction because there were no imediate reaction in the class.

3 Controlling Variables. Why was it important that the cubes of egg white all be the same size?

To get the best quality experience and get the same conditions in every tube.

4 Drawing Conclusions. What did the lab show about the ability of pepsin to digest protein?

It works better without acid.

5 Communicating. Write a paragraph in which you describe the purpose of test tube A and test tube C as they relate the steps you followed in the procedure.

We want to see the influence of pepsid on protein digestion, in tube A we put pepsine only to check the results, and in tube C we put acid only.

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7) Design an experiment. Propose a title for your experiment. What problem do you want to solve? What variable will you change? 

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7) Design an experiment. Propose a title for your experiment. What problem do you want to solve? What variable will you change? 

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Title: Ivestigating digestion

Hypotesis: if we put smaller pieces digestion works better.

Procedure. In tube A put the biggest piece possible of egg white and in tube B put a lot of little pieces of the same size but cut.

We will change the size of the pieces of egg.

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8) Copy the graph from page 3 of this document into your lab report. 

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8) Copy the graph from page 3 of this document into your lab report. 

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1 It represent the percentatge of the egg white digested.

2 About 14 hours.

3 70%

4 12h to 16h

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What conditions are needed for the digestion of proteins in the stomach.

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Test-tube

Pepsin

Water

4 strips of blue litmus paper

Cubes of bailed egg white

10 ml plastic graduated cylinder

4 test tubes with stoppers

Making pencil

Dibuted hydrochlaric acid

Plastic stirrers

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1 We will investigate how acidic conditions effect protein digestion.
2 Label four test tubes.
3 The protein you will test is boiled egg white wich has been cut into cubes. Add 3 cubes to each tube.
4 Add 10ml of the enzyme pepsin to the test tube A.
5 Add 5ml of pepsin and 5ml of water to the tube B.
6 Add 10ml of hydrochloric acid to the test tube C.
7 Add 5ml of pepsin and 5ml of  hydrochloric acid to tube D.
8 Obtain four strips of blue litmus paper. Dip a clean plastic stirrer into the solution in each tube and then touch the stirrer to a piece of litmus paper.
9 Insert stoppers in the four tubes and store them.
10 The next day examine the content of the tubes.Then test each solution with litmus paper.

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5) Results

We put a piece of paper and we could see how two of those papers were pink, another yellow and the other didn’t have anything it means that there were tubes more acidic than others.

A few days after there were tubes that decomposed almost completely and others that maked the pieces of egg stronger.