A) How many mosm solute will 1 gram of NaCl yield? Show your calculations. (1gNaCl/1)*(1000mg/1gNaCl)(2/58mg)=34.5mOsm. 3. Mixed Solutions: If 1 mmole of glucose (180mg=1mOsm) and 1 mmole of NaCl (58mg=2mmOsm) are put into a beaker and distilled water added to make 1 liter, the osmolarity is 3 mOSm/L.
You will be given an unknown amino acid. It could be any of the amino acids in any ionic form. Weigh out about 400 mg of the unknown, recording the mass to the nearest milligram, and dissolve it in 20 mL of H2O. Set up the electrodes of the pH meter, a magnetic stirring bar and stirring motor, and a burette as shown in Figure 1. Take extreme care to see that the electrodes are not damaged by the stirring bar or by rough treatment.
b) How does the body handle the ammonia that results from that process? c) How does the body use the keto acids that result from that process? 13. a) What is the difference between high quality and low quality protein? b) How does mutual supplementation help to create a complete protein? c) What are two foods you can combine to get this complete protein via mutual supplementation?
Lactase is effective at pH 2 – 7 (including dH2O) and therefore breaks down the lactose sugar in milk into glucose and galactose. As a result, the test strips will turn a shade of brown. . Lactase is not effective at pH 10 – 12. At the high pHs, the enzyme lactase is denatured and is no longer able to break down the sugar lactose in milk.
1 Lipids GRT TASK 1 208.5.6 Rosina Lloyd Western Governor's University 2 A. Explain how energy is stored as fat, including identification of storage molecules and tissue. The molecule fat is store in the body in many forms. It can be stored in the body as a carbohydrate, which is used when the supply of fats is limited. Fat is also store in the system as triglycerides that forms three of our good saturated fatty acids.
Gabbeh Parente D September 21, 2010 Penny lab Problem: Does the number of drops of liquid a penny can hold depend on the type of liquid being used? Materials: * Beaker of water. * Eye dropper * Penny * Petri dish * Paper towels * Chocolate milk Pre-lab: Independent variable: water Dependent variable: Chocolate Milk Hypothesis: If the type of liquid changes (from water to chocolate milk) then the number of drops to fill the penny will decrease. Procedure: * Determine the number of drops of water it takes to fill a penny, holding the eye dropper 2 cm. from the penny.
Dip the strip in the milk, Wait five seconds, Record Data 6. Now add a few drops of each acid or base to each cup 7. Dip a new glucose a strip and record your data 8. Add a few drops of enzyme to each cup 9. Use a new glucose strip and record Data: Conclusion: According to my data, pH levels do, in fact, affect the results of Lactex.
Identifying Organic Compounds Lab Objective: The objective is to use indicators to test for the presence of organic compounds. Theory: The major types of organic compounds in some common foods are proteins, carbohydrates, lipids, and nucleic acids. In this lab we used indicators to find organic compounds. An indicator is any substance used to assist in the classification of another substance. When an indicators color changes it shows the presence of an organic compound.
Check if the milk has clotted in each test tube by removing the test tubes from the water and tilting slightly every 30seconds. If the milk has clotted it should not move. 9. Record the time taken for the milk to solidify completely for each test tube in the results table. Results: Groups | 0-10degrees | 35-40degrees | 80-90degrees | 1 | NR | 2.35 | NR | 2 | NR | 3.30 | NR | 3 | NR | 2.28 | NR | 4 | NR | 1.40 | NR | 5 | NR | 5.30 | NR | Discussion: Temperature affects the rate at which molecules collide with each other.
Another source of rennin is junket tablets, which are used in setting milk into a solid junket or dessert. Junket tablets are used as a source of rennin in this experiment. Materials (per group) (This experiment may be done in groups of four. Each student can look after two temperature set-ups.) » 2 Bunsen burners »2 tripods » 2 wire gauzes » 2 × 150 mL beakers » 2 × 250 mL beakers for 70°C and 80°C water baths » 5 Styrofoam cups for unheated water baths » 8 thermometers 0–100°C » 16 test tubes in a rack » 10 mL measuring cylinder » junket tablet » 50 mL milk » Crushed ice » dropper » plastic spoon » marking pen » Distilled water Note: Thermostatically controlled water baths may be used if available.