Abstract This experiment was designed to answer the question does temperature affect the amount of osmosis? The hypothesis predicted was that the higher the temperature the more osmosis would occur‚ but too high the osmosis would halt due to enzyme and substrate overheating and losing shape. After research and class time it was concluded that osmosis is a passive transport and would not require energy or enzymes due to it going from high to low concentrations with the gradient
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Foundations in MicrobiologySeventh Edition 13.1 We Are Not Alone The human body exists in a state of dynamic equilibrium Many interactions between human body and microorganisms involve the development of biofilms Colonization of the body involves a constant “give and take” Contact‚ Colonization‚ Infection‚ Disease Microbes that engage in mutual or commensal associations – normal (resident) flora ‚ indigenous flora‚ microbiota Infection – a condition in which pathogenic microbes penetrate
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What is Food Microbiology Food microbiology is the study of food micro-organisms; how we can identify and culture them‚ how they live‚ how some infect and cause disease and how we can make use of their activities. Microbes are single-cell organisms so tiny that millions can fit into the eye of a needle. They are the oldest form of life on earth. Microbe fossils date back more than 3.5 billion years to a time when the Earth was covered with oceans that regularly reached the boiling point‚ hundreds
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I am going to investigate osmosis when potato is placed in different concentrations of sucrose. I am aiming to witness osmosis in 5 different concentrations of sucrose. I will use 5 varying concentrations so that I have a wider spread to compare the results‚ and check that I don’t have any anomalies Prediction Osmosis is the process of diffusion of water molecules from a weaker solution into a stronger solution‚ through a semi permeable membrane. The tiny pores in the membrane
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aspects that need to be considered during the experiment are to provide caution whilst handling benedict’s solution as it can be caustic to the skin and eyes. As a safety measure wear a lab coat‚ gloves and protective goggles at all times . Handle glass ware with care to minimise breakage. Follow general lab practice. METHOD The apparatus was
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the substances that enter or leave the cell do so through diffusion. Osmosis‚ a type of diffusion‚ is the movement of water across a selectively permeable membrane. In osmosis‚ water diffuses across the area of lower solute concentration to that of higher solute concentration until the solute concentrations of the environment and the cell are equal. Tonicity‚ which is the ability of a solution to gain or lose water due to osmosis‚ results in an environment that is isotonic‚ hypertonic‚ or hypotonic
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BTN 211 TOTORIAL 1 Chapter 1 1. The History and Scope of Microbiology Which of the following distinguish the field of microbiology from other fields of biology? a. the size of the organism studied b. the techniques used to study organisms regardless of their size c. both the size of the organism studied and the techniques employed in the study of organisms d. neither the size of the organism studied nor the techniques employed in the study of organisms regardless of their size Who of
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In this experiment‚ we had to demonstrate the process of osmosis using potatoes‚ and to determine the concentration of the cytoplasm of the potato. To demonstrate this‚ we had 6 test tubes and poured in different sucrose solutions of the following concentrations: 0.0M‚ 0.1M‚ 0.2M‚ 0.5M‚ and 1.0M. Once added in with all the sucrose solutions‚ we added in the 6 cylindrical potatoes of equal diameter and length. Before and after putting it in the potatoes‚ we had to weigh the initial and the final mass
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Biology 2020 Microbiology Study Guide for first exam The history and scope of microbiology 1) What are the organisms/entities of study in the field of microbiology? * Bacteria * Archaea * Eukarya * Viruses and Prions (Acellular entities) 2) Who was the first human to publish extensive descriptions of microorganisms? * Antony van Leeuwenhoek 3) How did Louis Pasteur dismantle the theory of spontaneous generation in bacteria? * Swan neck flask experiment: Flask
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Microbiology Lecture Notes: I.Cell1/27/14 1. Robert Hooke 2. Basic unit of structure and function in all living things. a. Unicellular à Microscopic b. Multicellular à Microscopic & Macroscopic c. 2 main cell groups: 1. Eukaryote = True Nucleus 2. Prokaryote= Bacteria (only) a. Karyo = nucleus‚ pro= pre‚ Eu= true 3. Components of a cell: a. Nucleus: brain of cell; has nuclear membrane/envelope 1. DNA à Chromosomes (Genes) à make protein à Macromolecule
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