Are Viruses Alive? 1. Describe how a virus differs from bacteria. Most Viruses are harmful and their only purpose is to invade a host cell‚ reproduce and destroy the host cell in the process. Close to 99% of bacteria are beneficial with only a few that cause diseases. Life on earth could not exist without bacteria. Bacteria produce nearly half of the oxygen found in the atmosphere. Viruses have no cells‚ nucleus‚ cytoplasm or cell membrane. Viruses consist of tiny particles of nucleic acid
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infected with the S bacteria grew sick‚ and died‚ while mice infected with the R bacteria were not harmed. To determine whether the capsule on the S bacteria were causing the mice to die‚ Griffith injected the mice with dead S bacteria. The mice remained healthy. Griffith then prepared a vaccine of weakened S bacteria by raising their temperature to a point at which the bacteria were “heat-killed” meaning that they could no longer reproduce ( the capsule remained on the bacteria). When Griffith
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of the Pacific‚ Stockton Abstract The bacteria Sulfolobus Oileatacus has an enzyme called the Devastator‚ DevA‚ that helps metabolize crude oil. Since the bacterium is a thermophile‚ it won’t survive at normal temperatures and cannot be used to clean up oil spills. The devA gene was cloned through the polymerase chain reaction and was confirmed to be present using a restriction enzyme digest; after which the cloned genes were inserted into the bacteria E. coli through the transformation process
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antibiotic concentration decreases bacterial growth. Scientific Theory Bacteria are prokaryotes and can be identified by their shape. Spherical bacteria are called cocci‚ rod shaped bacteria are called bacilli‚ spiral shaped bacteria are called spirilla and curved shape bacteria are called vibrio. All bacteria possess a cell wall‚ cell membrane and cytoplasm‚ but no defined nucleus and no nuclear membrane. Some bacteria may contain other structures such as mesosomes‚ pili‚ photosynthetic membranes
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Predicting the Growth of Microorganisms Abstract Bacteria have been around us all the time just that not are bad there are also good bacteria. Throughout the session the bacteria changed in shape and how large it grew in many different ways. There were many different results in every bacteria that was examined‚ no bacteria looked alike towards one another. The bacteria in order to be produced it need to be put nutrient agar that would nourish it. The bacteria were inoculated into the nutrient agar so it
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already know about any organism and any laboratory procedure to the difficult task at hand. It is possible to identify a mixed culture by running familiar experiments on the unknown bacteria and taking information already known about specific bacteria and applying it to the results. This helps to slowly eliminate any bacteria that do not correspond with the results. I obtained tube number twelve to run various tests on. There are only two microorganisms‚ one is Gram positive and one is Gram negative‚
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Gram-negative and Gram-positive bacteria 2. Author: Nick Fiore‚ University of Kansas‚ Biology 402‚ Fall 2014 3:00pm room 6040 3. Abstract: The purpose of this experiment was to isolate two unknown bacteria and perform a series of selective and differential tests to correctly identify each. After the bacteria was isolated a series of differential and selective tests following the dichotomous key attached were used to identify each bacteria. The Gram-positive bacteria were identified as Staphylococcus
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nucleus and membrane-bound organelles (making them far more complex). 2.) List and describe the two domains of prokaryotic organisms. a. Bacteria- Most are a specific shape (cylindrical‚ spiral‚ or spherical). Cell wall contains peptidoglycan. Multiply by binary fission. b. Archaea- Similar in shape‚ size‚ and appearance to Bacteria. Multiply by binary fission. Cell wall does not contain peptidoglycan. 3.) List and describe the four groups of eukaryotic microorganisms
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What Is Microbiology? Microbiology is the study (logy) of very small (micro) living (bio) things. Microbiology is the study of microorganisms. These "bugs" include: bacteria (that’s the Latin plural for bacterium); viruses (that’s the non-Latin plural for virus - virii sounds weird‚ so I don’t say it); and‚ fungi (that’s the Latin plural for fungus - which by now you have guessed‚ or already knew‚ and may not be all that interested to know‚ anyway). Microbiology is actually made up of several
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digestive problem‚ human and pig respiuratory problem - Problem when it mixed with the human virus CH. 19 -know the general sizes- biggest sizes eu. Prions‚ etc. -know mad cow Where do we find microbes in our family tree of life and protest Bacteria and archae are prokaryotic and eukarya is euchaarotic How are protisit defined and slip into main groups. How do they get there food? Parasites that we find specifically in the animal like porotist The kingdoms are sepearted by how they eat their
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