Identifying the Unknown Bacteria: Bacillus cereus Brittany Moy Coastline Community College Abstract Bacillus cereus is a Gram-positive‚ facultative aerobic‚ spore-forming‚ rod-shaped bacterium that is widely distributed among the environment. Introduction The reason for identification of unknown bacteria was to help students recognize different bacteria through different biochemical tests and characteristics. This is important in the medical field because identification of unknown bacteria
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When lactose becomes available the genes encoding β-galactosidase and lactose permease are upregulated in E. coli. true 2 Different globin polypeptides are expressed at similar levels during the embryonic and fetal stages of mammalian development. false 3 RNA polymerase can bind to the promoter region of the DNA even when the lac repressor is bound to the operator site. true Hide 4 Both eukaryotes and prokaryotes require a promoter region for gene
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adults. Unfortunately for those people‚ milk makes up an ingredient in many popular foods and they are unable to enjoy the same experiences as their friends and family. Milk allergies are not to be confused with lactose intolerance‚ as they are far more serious and dangerous to one’s health. Lactose intolerance is when one’s digestive system simply cannot handle milk‚ so it responds with bloating and discomfort. With milk allergies‚ the immune system conducts an abnormal response to the ingestion of milk
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The use of positive and negative controls to determine the macromolecules present in an unknown solution Course # 6130‚ Wednesday‚ 7-10 PM‚ B2-151 Lab performed: September 21st‚ 2011 INTRODUCTION Every living thing is dependent on large complex molecules‚ known as macromolecules. The objective of this lab was to correctly identify which macromolecules the unknown solution was comprised of using various substances as experimental controls. There are four major types of biological macromolecules
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Disaccharides Maltose‚ sucrose‚ lactose Oligosaccharides 3 to 9 Polysaccharides or glycans Homopolysaccharides Heteropolysaccharides D-Glucose in Nature The most abundant carbohydrate is D-glucose. Cells of organisms oxidize glucose for energy: In animals excess glucose is converted to a polymer called glycogen. Disaccharides On hydrolysis give two molecules of monosaccharides E.g Sucrose (Cane sugar) Lactose (milk sugar) Maltose (malt
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ANALYSIS OF CARBOHYDRATES Methodology Materials: |1% solutions: | conc. H2SO4 | |glucose‚ fructose‚ maltose‚ sucrose‚ lactose‚ |Molisch reagent | |agar-agar‚ gum arabic‚glycogen‚ cotton‚ |I2 in KI solution (Lugol’s iodine reagent)
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consumed the product. * One of the important uses of Lactobacillus Bulgaricus is making yogurt. It helps in this process by fermenting lactose. * Another important function of Lactobacillus Bulgaricus is its ability to break down special enzymes like lactose in the body. This breaking down of enzymes helps the digestive process‚ especially for people who are lactose intolerant. * This helpful bacteria also helps other beneficial bacteria to grow which helps the immune system. * It can also
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THE CHEMISTRY OF LIFE (Review 1-7) I. Basic Chemistry A. Elements 1. Definition- an element is a substance composed of a single type of atom 2. Major elements of the human body 3. Trace elements of the body B. Atoms 1. Definition- the atom is the smallest part of an element which cannot be broken down further by ordinary chemical means. Atoms are composed of protons‚ neutrons and electrons. 2. Particles that make up atoms
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Lesson B3.19 Biotechnology Specification learning outcomes HSW statements Prior learning from KS 3 Exemplar teaching activities Main differentiation Resource sheets BTEC Links 3.1 Describe biotechnology as the alteration of natural biomolecules using science and engineering to provide goods and services 3.2 Describe a fermenter as a vessel used to cultivate microorganisms for the production of biomolecules on a large scale 3.3 Explain the need to supply suitable conditions in fermenters
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Diarrhea Causes & Causes of Diarrhea Most of the time we know what caused our diarrhea‚ right? You had a meal and within 2 hours you were stuck on the toilet. Or you had some ice cream and an hour later the diarrhea hit you. Or maybe it was the next morning. But what is it about that meal or that ice cream that has you screaming‚ "I hate diarrhea!"? Or what about other times when diarrhea seems to come out of nowhere? What caused it then? I’m going to share with you a number of causes of diarrhea
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