Unknown Lab Report: Enterobacter cloacae Jessica Sainvil Professor Cupido Bio 253L1 Thu 9:30-12:30 Due Date: 12/6/12 Unknown#103 Introduction The bacterium Enterobacter cloacae isolated from the given #103 was a Gram-negative Rod. The purpose of this lab was to isolate and identify the genus and species of an unknown bacterium. It is important to identify an unknown microorganism because knowing how the bacteria work and how it is structured means knowing how it can affect humans. Unknown bacteria may also be used clinically many pharmaceutical drugs are based on products made by organisms (Katzung, B.G.2004). In order to identify the unknown organism a series of tests were performed.
Maize in the Columbian Exchange During the period of 1450- 1750, there was an exchange of diseases, ideas, and food called the Columbian Exchange. Maize, a rich staple crop was introduced to the Old World countries in Africa, Europe and Asia during the Columbian Exchange. Maize was originally from the Western Hemisphere and it is thought to have first grown about 7000 years ago in Mexico. Corn contributed to both the old and new world economies by taking part in the slave trade. Corn also became an important part of the diets of the people of the regions it spread to.
Hybridization- crossing different traits to bring the best of organisms into one. For example crossing disease resistance of one plant with the food-producing capacity of another to produce a superior plant. 3)Cloning is the process of taking a single cell from an adult organism to recreate another genetically identical organism. 4)DNA fingerprinting is developed by molecular biology; it analyzes unique sections made up of a variety of DNA band. DNA fingerprinting is a powerful and crucial tool that can determine a person’s identity.
Bacteria, archaea, eukaryote 9. Name the 4 groups/kingdomes in the domain Eukarya and give characteristics of each based on feeding habits and the number of cells they are made up of. Protista, plantae, fungi, animalia 10. What are 4-5 characteristics that help to separate humans from other living organisms? *
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.
00001111 11100001 00011111 11010100 15.225.31.212 d. 1110011 00010111 00001100 01110100 115.23.12.116 5. Can we assign these IP addresses to hosts, if not, why: (10 points) a. 140.279.200.14 No, because 279 > 255 b. 160.125.24.4.15 No, because There can be no more than four numbers. c. 66.154.11100000.96 Is not allowed mixture of binary notation and dotted-decimal notation d. 215.54.66.43 Yes we can e. 220.196.082.46 There must be no leading zero (045).
Staphylococcus auricularis were first distinguished from other Staphylococcus by growth rate and colony morphology on agar, carbohydrate reaction pattern, cell wall composition, and deoxyribonucleic acid sequence. (Kloos,
7. Archaega does not have cell wall but they do compose of peptidoglycan molecules with the exception of methanobacteria who have pseudo peptidoglycan in their cell wall. 8. There are three main types of archaea: the crenarchaeota which are characterized by their ability to tolerate extremes in temperature and acidity. The euryarchaeota which include methane-producers and salt-lovers; and the korarchaeota catch-all group for archaeans about which very little is known.
We can use the same principal we used for the first experiment, Manganese dioxide is not a protein, not an enzyme, it is a catalyst. Due to this, no products are formed, and just as we anticipated, the reaction rate was given a 0. 3. The 3rd experiment is a mixture of 2 mL H2O2 and liver. In this situation, both the substrate (H2O2) and the enzyme (catalase) are present, and
13. State two observable characteristics that you can use to distinguish an animal cell from a plant cell based on what you saw using the compound light microscope. Show your work. Record the high-power field diameter both in millimetres and micrometres in your table. Skill Practice Part 2 — Estimating Cell