However majority of the solid Iodine was left at the bottom of the test tube; which leads to the conclusion that it’s not reactive on water. 2. Solid iodine in 1 mL of potassium iodide is slightly more soluble. The liquid in the small test tube turned a dark brown color. 3.
IV. Materials V. Procedure VI. Observations/ Data; Lesson Three Collection and Analysis: A) Data Collection; 1. For the first plate, +pGLO (LB/amp), there was not a lot of growth on the plate, in comparison to the other groups and it did not glow under UV light. For the second plate, +pGLO (LB/amp/ara), there were even fewer colonies observed, unlike any of the other groups as well, and it did glow under UV light.
Include at least 4 organisms and be sure to identify which organisms are the producers, first level, secondary level, and tertiary level consumers. In addition, state the nutritional modality of the consumer (herbivore, carnivore, etc.) (8 pts.) 2) Make a list of as many organisms you can identify that contributed to a balanced ecosystem in and around Pride Rock. Using the characters from the movie, draw and label a complete food web, explain how they are connected, and categorize the organisms by their nutritional modality.
Procedure: Before beginning this lab please take the time to review this hand out and compare it to the information you know about organic molecules. Then, develop a hypothesis using the If, and Then statement. Go to http://www.okc.cc.ok.us/biologylabs/ and click on the “Organic Molecules” link. Read the introduction, and then proceed with tests for carbohydrates, proteins, fats, and foods. Record and answer all questions AS YOU GO.
Diffusion Across a Plasma Membrane In order to demonstrate the way in which semipermeable membranes work, an experiment replicating the digestive system of a caterpillar was preformed. To simulate a semipermeable membrane dialysis tubing was used. It is capable of demonstrating the way in which a semipermeable membrane will allow only molecules under a certain size to pass through it. First, to simulate the crop of the caterpillar, a small beaker was filled with four pipettes worth of cooked starch as well as four pipettes worth of alpha amylase solution and stirred. The cooked starch acts as the food, which the caterpillar would eat, and the alpha amylase, which is a digestive enzyme common in saliva, is stirred with it to simulate the chewing and mixing of food and saliva which constitutes the first step in the digestive system.
Examine your living organism and determine if it is a bacteria, achaean or a eukaryote. At each step in classification, check the requirements for each category to determine where the species belongs. You then would begin to ask yourself a series of questions about the organism one question will lead to another. If the organism cannot be identified through the questions you will than need to do a gram staining process. You will look at the bacteria through a microscope exposing the bacteria's cell wall to two types of stains: a violet and a red one.
In order to identify the unknown organism a series of tests were performed. The tests used were glucose, sucrose, lactose fermentation; Urease, motility, MR-VP, citrate, oxidase, and indole these tests were used to identify the genus of the unknown and a McConkey agar plate was used to differentiate and confirm the species of the unknown. This report will explain and give more in depth reasons why certain tests were done and the results yielded from them. Materials & Methods On the first day after receiving the unknown microorganism a streak plate was aseptically done as shown in exercise 2 of the lad manual (Kleyn 9). The streak plate technique is done to isolate a colony formed by a single cell from a mixture containing millions of cells.
What kinds of clinical specimens may yield a mixed flora in bacterial cultures? Oral, Skin, or GI specimens 5. When more than one colony type appears in pure culture, what are the most likely sources of extraneous contamination? Individual colonies can be picked up on the inoculating loop, or straight wire and inoculated in to the fresh agar or brother media References Cowan, M. K. (2012). MICROBIOLOGY: A SYSTEMS APPROACH, THIRD EDITION.
8) See column 8 and back for work. 9) My accuracy was not really bad but it wasn’t that good, some of the guesses I made were almost accurate but others were way off. Atom | Average mass of one atom | Mass relative to carbon (#:1) | Atomic mass (from periodic table) (g) | Number of atoms in a relative mass (column 4/ column 2) | Carbon | 2.00E-23 | 1 | 12.01 (g) | 6.005 x 1023 | Iron | 9.30E-23 | 4.65:1 | 55.85 (g) | -65.15 | Aluminum | 4.49E-23 | 2.245 | 26.98 (g) | 6.010 x 1023 | Zinc | 1.08E-22 | 5.4 | 55.85 (g) | 5.17 x 1023 | Lead | 3.44E-22 | 17.2 | 207.2 (g) | 6.024 x 1023 | Copper | 1.05E-22 | 5.25 | 63.55 (g) | 6.052 x 1023 | PART:2 Question 1) I think carbon’s role is something to do with global warming I think I’m not sure, this doesn’t make sense because why does global warming have anything to do with the mole or even chemistry. | 2) In column 5 all the numbers are very close to Avogadro’s number 6.02 x 1023. 3) One gram = 6.02 x 1023 amu.
Why? Lysine had the lowest Rf value because it was most polar and therefore has the highest affinity for the polar stationary phase. 8) What is the Rf value(s) of unknown sample. What are the components of your unknown sample? The unknown sample’s Rf values were 0.42, 0.82.