The Chemical Constituents of Cells

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The Chemical Constituents of Cells

Background Information

Mr. Barrett gave us a sheet on staining cells this helped us with the understanding of the experiment. We also did an experiment in class on potato cell, and in our findings we found starch. We also researched the foods and found that glucose is in the apple pulp.

Question Write my Essay on The Chemical Constituents of Cells for me

Are the following compounds found in everyday foods?

Protien, Glucose, Starch, lipids & sodium chloride

Hypothesis

My Hypothesis is that protein will be found in the milk & bread , Glucose in the apple pulp & bread, Starch in the bread & potato, Lipid in the milk & bread and Sodium chloride in the potato & bread.

Aim

To identify a range of chemicals found in potato pulp, apple pulp, milk and bread.

Method

The method will be broken into two parts

1. The testing of standard chemicals.

Put two test tubes (medium) into a test tube holder, add a chemical (E.g. glucose, starch) into each test tube. In each test tube put water as a control negative result. Follow the procedure ( table 1 below) for the positive result. This procedure shows you the control to compare your results.

TABLE 1

Protein (egg white) Add ml in a test tube and then add 1ml NaOH and then add 1- drops of CuSO4 and then shake.

Glucose Add to that ml of glucose and 1ml of Benedicts solution and heat over a Bunsen flame.

Starch Place a few drops of starch suspension on a tile. To this add a few drops an iodine solution.

Lipid (vegetable oil) Put five drops of oil into a test tube add 5ml of water then shake. Then add drops of Sudan and then shake again.

NaCI Add ml of Sodium Chloride and the add a few drops of sliver nitrate solution.

Results of control testing

Food ChemicalPositive testNegative test

ProteinPurpleVery clear Light blue

GlucoseOrangeBlue

StarchBlue BlackYellow

LipidsOrangeLight orange

NACLMilkyClear

. Put four more test tubes in your test tube holder, and add your cfood chemical then add the apple pulp, potato pulp, milk and bread to each tube. Compare the results with the negative and positive tests for each chemical test , repeat for each food chemical.

Results of experiment

FoodProteinGlucoseStarchLipidNaCI

Potato pulpYesyesyesnoyes

Apple pulpNoyesnonoyes

MilkYesnonoyesyes

BreadYesyesyesyesyes

Analysis of results

We found that when testing for the presence of protein that the positive test turned purple for the potato pulp, milk and bread. But it turned very clear blue colour for the apple pulp. This indicates that there are no proteins in apple pulp.

In the Glucose test the results were that it turned orange for the potato pulp, apple pulp and bread. For the milk it turned a blue colour, this shows that there isnt any glucose in milk.

When testing for the evidence of Starch we found that the positive foods turned blue/black were potato pulp and bread. That means the apple pulp and milk were negative and they turned yellow.

We found in lipids (oils) that milk and bread had a positive orange colour. The apple and potato pulp had a light orange colour and this shows that they were both negative.

We found in NaCI that all of the food turned a milky colour so they are all positive.

Discussion

The experiment has established what chemical compounds are found in the foods tested. It is surprising that protein was found in potato and sodium chloride was found in all the compounds which was not originally predicted. All other predictions in the hypothesis were correct.

Conclusion

It has been discovered that using the correct control groups it can be determined what food chemicals are found in different foods.

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The State of the Nation

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The events of September 11th changed our lives forever and greatly impacted the state of our nation. Many changes have taken place in response to the terrorist attacks, and The United States may never be able to return to the way things used to be.

Along with the war on terrorism, we are dealing with a recession, and the stocks are dropping along with the growing number of employees jobs. The giant corporation called Enron has fallen, leaving behind a government investigation, one dead executive, and thousands unemployed. All the things have become challenges for the state of our nation, giving us the golden opportunity to rise above the problems and become stronger than ever.

Even though several major tragedies have occurred, we have regained the key to helping us overcome it all-- the solid unity of our country. Flags adorn buildings, houses, cars, and T-shirts, proudly reflecting the patriotism of our nation. We are involved in a war on terrorism that will save other countries from going though what the U.S. has. Afghanistan villages held by the Taliban have been rescued, allowing men and women to have freedom and be able to make their own choices. As for the recession, I hope the lesson will be that large corporations are not above the law, and that there is more to life than money.

It is true that our nation is in a difficult state, not knowing what will happen next and we are all waiting for the other shoe to drop. Keen observation is needed now and everyone is on alert, making our nation safer by the minute. In spite of the present events happening so fast, we still go on and try to live our lives. The American spirit is instilled in us and no matter the state of the nation we will band together and overcome the challenges, while savoring the joyous moments of peace we will never again take for granted. We must once again return to the pride and patriotism of the early Americans, and hopefully continue to build an America that represents all of the best that life has to offer. Help with essay on The State of the Nation

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Life

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The soil of an area provides the foundation for plant and animal development. Areas that have not yet developed plants tend to have poor, hard, or shallow soil. As plants begin to develop, soil tends to improve.

As soil conditions change, different communities of plants and other organisms may develop over time in a single area. This sequence of communities is called ecological succession. Succession generally follows one of two patterns. Succession is said to be primary if it occurs in a habitat that initially has no soil or organisms. An example of such a habitat is a lava field after a volcanic eruption. Succession is secondary if it occurs as a result of a disturbance. An example of such a disturbance is a forest fire that does not destroy the soil.

The plant species tend to succeed one another in patterns related to factors such as competition for soil and light. The pioneer plants, which develop first, must have the kinds of roots and other adaptations that allow them to live in the harsh conditions that exist early on. The improved soil that results from the growth of these plants then serves as home for plants that could not survive earlier. Eventually, a stable community, called climax community, will develop and remain unchanged unless conditions are disturbed significantly

The soil of an area provides the foundation for plant and animal development. Areas that have not yet developed plants tend to have poor, hard, or shallow soil. As plants begin to develop, soil tends to improve.

As soil conditions change, different communities of plants and other organisms may develop over time in a single area. This sequence of communities is called ecological succession. Succession generally follows one of two patterns. Succession is said to be primary if it occurs in a habitat that initially has no soil or organisms. An example of such a habitat is a lava field after a volcanic eruption. Succession is secondary if it occurs as a result of a disturbance. An example of such a disturbance is a forest fire that does not destroy the soil.

The plant species tend to succeed one another in patterns related to factors such as competition for soil and light. The pioneer plants, which develop first, must have the kinds of roots and other adaptations that allow them to live in the harsh conditions that exist early on. The improved soil that results from the growth of these plants then serves as home for plants that could not survive earlier. Eventually, a stable community, called climax community, will develop and remain unchanged unless conditions are disturbed significantly

The soil of an area provides the foundation for plant and animal development. Areas that have not yet developed plants tend to have poor, hard, or shallow soil. As plants begin to develop, soil tends to improve.

As soil conditions change, different communities of plants and other organisms may develop over time in a single area. This sequence of communities is called ecological succession. Succession generally follows one of two patterns. Succession is said to be primary if it occurs in a habitat that initially has no soil or organisms. An example of such a habitat is a lava field after a volcanic eruption. Succession is secondary if it occurs as a result of a disturbance. An example of such a disturbance is a forest fire that does not destroy the soil.

The plant species tend to succeed one another in patterns related to factors such as competition for soil and light. The pioneer plants, which develop first, must have the kinds of roots and other adaptations that allow them to live in the harsh conditions that exist early on. The improved soil that results from the growth of these plants then serves as home for plants that could not survive earlier. Eventually, a stable community, called climax community, will develop and remain unchanged unless conditions are disturbed significantly

Please note that this sample paper on life is for your review only. In order to eliminate any of the plagiarism issues, it is highly recommended that you do not use it for you own writing purposes. In case you experience difficulties with writing a well structured and accurately composed paper on life, we are here to assist you. Your cheap custom college paper on life will be written from scratch, so you do not have to worry about its originality.

Order your authentic assignment from and you will be amazed at how easy it is to complete a quality custom paper within the shortest time possible!