Murder and a Meal: An Organic Compounds Lab Problem: Based on the contents of the victim's stomach, where did he eat his final meal? Background Information: A macromolecule is a molecule that contains a large number of atoms, such as proteins, nucleic acids, carbohydrates or lipids. Macromolecules are formed by a process known as polymerization in which large compounds are built by the joining of smaller one together. The smaller units are known as monomers and monomers together form polymers. Macromolecules are important to living things for example proteins are an example of macromolecules. Proteins are important to our survival because the fight germs and help in transporting molecules in and out of cells. Hypothesis: Friendly's: …show more content…
In order to test if the macromolecule lipids were present, the stomach contents were mixed with distilled water, and the solution is placed on a brown paper. Oil when placed on paper, usually live that spot lucid after a specific amount of time. This occurred with the brown paper proving the existence of lipids. Next, a test was administered to test for the macromolecule Glucose. Glucose was shown to be present through the heating of the stomach contents when mixed with water. When exposed to heat, sugar will at first melt into a thick syrup. As the temperature continues to rise, the sugar syrup changes color, from clear to light yellow. The solution changed from the color of the stomach contents to yellow establishing the existence of …show more content…
When the test for the protein macromolecules where completed there proved to be an absence of proteins because there was no change in color after the 5-7 drops of the Buriet solution had been added. Finally, after all the experiments were performed based on the knowledge of macromolecules and how all foods are made up of different macromolecules the data gathered was used. Considering an analysis of the stomach contents was performed that suggests that it is food that the victim ate that is being examined, so the macromolecules present in the stomach contents are those that are present in the food he ate. With this mind, as the results came up as there being a presence of the macromolecules glucose, starch, and lipids the only restaurant that offers the food that contains these macromolecules is the restaurant, Bella
Last test, inoculation of phenylalanine agar is used to determine if phenylalanine deaminase oxidizes phenylalanine into phenylpyruvic acid and ammonia. Sixth test, is a Multiple Test Media used to determine the physiological characteristics of unknown #398. First test, Inoculation of Kligler 's Iron agar was used to determine the production of hydrogen sulfide from cysteine and fermentation of glucose and lactose. Last test, inoculation of litmus milk is used to determine the fermentation of lactose, casein, lactalbumin, and
To test for reduced sugars, Benedict’s solution is used. If the substance turns to yellow, orange, or red, then it is positive. Biuret’s solution will be used to test for proteins. If
If the type of food is solid, then break it down into small little pieces. Then apply 5 drops of Biuret solution into each regular test tubes. Gently mix the substances within the test tubes and record their color. If the color of the food becomes blue-violet or pink, then there are proteins. To test for Iodine solution for starch, first empty and wash the test tubes from the previous solution and refill each tubes with food.
The items highlighted in blue have less than 10g of proteins due to them being side dishes like fries and onion rings. Lastly, the items in purple have proteins above 10g due to the meat inside these burgers for example BK chicken and Rodeo Crispy Chicken Jr. Some assumptions of this model would be the facts given by Burger King are correct and there are no hidden ingredients in the food items. Also, there are no modifications to the food order and everything is original. I also assumed that the ingredients they use for every food item would be from the same food supplier and hence there will not be any changes in the amount of calories, sodium, proteins and dietary fiber. I also assumed that the amount of proteins and dietary fiber are dependent on the amount of
To emphasis these claims, she gives a study of ingredients in fast-food meals and explains by biology how they affect
Starch solution is then placed into the test tube at a quantity of 5 mL. 5 drops of Lugol’s Iodine solution is added to the test tube. If the color changes, then it is known that starches are present in the solution. Proteins are next tested. In order to do this, 5 mL of gelatin solution is added to the test tube. 10 drops of Biuret’s reagent are added to test for protein.
Which two of the four macromolecules, do you believe to be the most important for life? Give evidence to support your suggestion (include a full description of the macromolecules) Describe both in terms in structure and function. From my study of macromolecules I decided to choose proteins and carbohydrates as my main two macromolecules. To me they are the most important two. Carbohydrates are important because they are a source of immediate energy and controls structure of cells such as cell wall etc.
The investigation was carried out to identify the presence or absence of biological molecules in serum 2216. If the concentration in each test tube of the dilutions carried out will be more concentrated then the concentration of the test tube before it, then the color will be at an equal concentration with the other dilutions performed. The hypothesis was wrong because of the difference in concentrations due to the different measurements within the dilutions done. The test for starch was to add a drop of iodine solution to the pipette in the spotting tile. A reducing sugar solutions is add inside a test tube with 3 drops to then add 3 drops of benedicts and plane in a water bath.
The liver was brown and divided into three main parts. The stomach was a light brown color. On the inside of the stomach was lots of fluid and had small squishy pieces of kale floating around. The rectum was kind of like macaroni filled with green speckles. The rectum had a green tint to it and looked like it was braided.
1% glucose, 1% maltose and 1% lactose all progressively get positive results by changing colours to reddish brown at the end of this experiment. In this case the aldehyde functional group that is present in the products (monosaccharides and some disaccharides) in this reaction is able to reduce copper in the presence of alkali and this produces colour changes while converting to an aldose sugar. Honey is made of fructose and glucose which instantly turned brown after the test-tube was placed in the boiling water because of its active aldehyde and carbonyl group. The copper (II) sulphate present in the Benedict’s solution reacts with electrons from the aldehyde group which results in a redox reaction to from cuprous oxide, a red brown precipitate that seen in all of the above mentioned solutions (Hill, 1982). Beer also gave positive results because it contains aldehydes and ketones (i.e. acetone, trans-2-butenal, furfual) during its beer production process where the sugars are converted through fermentation (Hill, 1982).
The next test used the test tubes labelled “cold” and , one again using a piece of liver and five milliliters of hydrogen peroxide with both being placed in the ice bath, both held vertical with a test tube clamp. After five minutes were up using a timer, the two tests were conducted. The test involving the boiling water had five milliliters of hydrogen peroxide poured into it. Meanwhile, the five milliliters of hydrogen peroxide was poured into the test tube labelled “cold”. After both tests, explanations were made about the
Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also
In every organism’s cell, a protein’s job is to break down different foods, power up the muscles, send brain signals that control the body, and transport all nutrients through blood. There are more than 100,000 different kinds of proteins in the human body that make up the immune system. Every protein has a long chain of amino acids (small molecules made up of atoms such as carbon, oxygen, nitrogen, sulfur, and hydrogen) which are joined together. For example, amylase is a protein—it starts the process where starch is broken down (from food) and converted into usable forms for the body. Proteins also consist of a structure.
Abstract The unknown concentration of benzoic acid used when titrated with standardized 0.1031M NaOH and the solubility was calculated at two different temperatures (20◦C and 30◦C). With the aid of the Van’t Hoff equation, the enthalpy of solution of benzoic acid at those temperatures was determined as 10.82 KJ. This compares well with the value of 10.27KJ found in the literature.
The basic molecules of life, including proteins, carbohydrates, lipids, and nucleic acids all play vital roles in a cell’s life. Proteins are fundamentally the building blocks of cells and have many functions. Proteins are made of one or more polypeptide strands. These strands are long chains of amino acids with many possible sequences.