The hanging drop is the established technique for inspecting pristine microbes‚ while the wet mount is easier to complete and typically offers enough data. List at least three types of bacteria whose names reflect their shapes and arrangements‚ and state the meaning of each name. • Streptococcus is spherical in shape and commonly seen in strep throat • Lactobacillus is bacillus or rod shaped and found in probiotics • Spirillum Pulli
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GFP gene to be used to track the flow of genes between bacterial cells through conjugation. A plasmid with these qualities is necessary to create a plasmid that can be transferred to Gram-positive bacteria low in C&G (which are hard to transform with traditional means) by conjugation with other bacteria. Current vectors have the malR regulatory protein which imposes a problem because when active‚ the malM gene is not induced‚ so maltase is not utilized and the gfp gene is not expressed when maltose
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Micro-organisms Micro-organisms Micro-organisms (or microbes) are literally microscopic organisms‚ which can only be seen properly with the aid of a microscope. These include bacteria‚ microscopic fungi (moulds) and protoctists. Although viruses‚ which are even smaller than bacteria‚ are generally considered to be non- living entities‚ they might also be included here as they are important disease-causing agents. Micro-organisms are the most numerous organisms in any ecosystem. There are about 159
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Clostridium tetani is a bacteria which can be found in soil and faeces‚ and causes the disease Tetanus. [Human Illnesses]. Clostridium tetani bacteria reproduce by binary fission because they are a bacteria. [St Margaret’s College]. In binary fission‚ bacteria reproduce by splitting themselves in half on a regular basis. [St Margaret’s College]. In ideal conditions‚ the Clostridium tetani bacteria may reproduce by binary fission every 20 minutes. [St Margaret’s College]. To live and reproduce by
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of microbes. The outcome of the search was a new kind of medicine which is known as antibiotics. Antibiotics is a variety of substances that control the growth or kill bacteria. Since bacteria is evolving rapidly and resisting antibiotics due to the overuse of the medicine‚ reducing the need and use would help slow down the bacteria from evolving. There are many things that can be done to help slow down the resistance of antibiotics. If the trend of this resistance keeps growing antibiotics wont be
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plasmid to a bacterial cell. The bacteria E. Coli was separated into two groups: one where the pGLO plasmid was added to the bacteria‚ which contains the genes of fluorescence and resistance to antibiotics‚ and the other lacking the plasmid. The two groups then placed in agar plates simulating different environments: the bacteria lacking the pGLO plasmid was subjected to an environment solely contaiing nutrients and another containing nutrients and ampicillin; the bacteria containing pGLO was subjected
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colonies ERIC LI Abstract In this experiment we work with different types of bacteria and experiment with their different properties and how they grow in certain situations. Different samples of bacteria cultures were gathered from different places such as the mouth‚ shaded mulch‚ and from the table top. The samples were collected by using a cotton swab and swiped onto a petri dish filled with nutrient agar. The bacteria were then left to grow on their own in a relatively well shaded area. As a control
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sterilized unless air is allowed to enter the vessel through an opening. Living organisms can spontaneously generate from nonliving matter. True or False? False The scientists usually given credit for disproving the theory of spontaneous generation of bacteria are: Tyndall & Pasteur Miller and Urey’s experiments attempting to recreate the prebiotic environment produced a rich mixture of complex organic chemicals from simple chemicals. True or False? True Miller and Urey’s experiments attempting to
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designed to lead to identification of two unknown bacterial species‚ from the combination of all results. A sample of bacteria was used‚ labeled “Sample 4”‚ from which both species was to be obtained‚ one gram positive and one gram negative. Table 1 is a list of the possible bacteria to be identified; the basic ideas and practice of identification of an unknown sample of bacteria are important for a microbiologist to develop. Not only is proper procedural practice necessary‚ the investigator must
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and classify bacteria‚ it is a differential stain that allows you to classify bacteria as either gram-positive or gram-negative. The foloowing is a breif summerary of the gram staining procedure. Apply the primary stain Apply Mordant Apply decolorizing agent Apply the secondary stain Bacteria that lose color easily after decolorization are referred to as gram-negative‚ and bacteria that retain the color from the primary stain is called gram-positive. Bacteria stain differently
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