The purpose of the unknown bacteria lab assignment was to select an unknown bacteria culture and‚ through a series of metabolic tests‚ identify which bacteria genus resided in the pure culture received. A nutrient broth inoculated with bacterial culture (numbered 45‚ henceforth referenced as U45) was selected and a streak plate was made to isolate a pure culture for use throughout the assignment. From the streak plate‚ several slides were made to determine the morphology of unknown 45. A Gram stain
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The Measurement of the Rate of Osmosis by using “Deshelled” Chicken Eggs (Effect of Solute Concentration upon Rate/Degree of Osmosis in Chicken Eggs) Introduction Every cell needs a mechanism that it uses in the maintenance of a constant internal environment. This is important in the control of the ever changing external environment to the cell. The transfer of materials to and from the cell thus needs a very stable mechanism to achieve this status. Cells are therefore bound a membrane that acts
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Aspects of Life and Spit Lab Formal Report 1. Abstract The objective of the Reducing Sugar Test was to test if the substance has a reducing sugar in it by adding Benedict’s solution and heating it‚ there would be a color change if a reducing sugar is present‚ or it will remain blue (no reducing sugar). The objective of the Starch test was to test for starch in substances by using Iodine. The iodine will cause a substance to turn to a dark blue color if it is positive for starch. The objective for the
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amylase Bacteria and Fungi with the presence of starch is the purpose of this experiment. Optimal conditions are known as conditions in which organism are able to thrive in‚ where it is able to function at its best. If an organism was to surpass its optimal temperature‚ the denaturing of the active site occurs‚ which means that it changes form‚ which in turn prevents the binding of substrates. For this experiment‚ amylase is an enzyme‚ which starch and glycogen is converted into a simple sugar.
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Observation: Part B Sample | Sucrose | Sodium Acetate | Naphthalene | Mass of solid (g) | 5g | 2g | 2g | Volume of water (50mL) | 50mL | 50mL | 50mL | Volume of water & solid (mL) | 53mL | 52mL |
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CHAPTER I INTRODUCTION Background of the study “Pain is only what you allow it to be”.- Cassandra Clare Pain is a subjective experience‚ and infants and children respond to pain with the behavioural reactions that depend upon the age and cognitive processes. Pain may occur as a result of procedures‚ surgery‚ illness or injury. During infancy‚ reflective behaviour is dominant. Between 3 and 10 months of age
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Yvan Mamboukuate 10/09/2013 BIO 101 Lab Report Biological Molecules Introduction: In this experiment‚ simple chemical tests will be performed to identify the presence of various types of biological molecules. These tests take advantage of the fact that different types of molecules have different functional groups and‚ therefor‚ different chemical properties. Thus‚ they will react to test reagents (also called indicators) differently. Materials: Biuret‚ Sudan III‚ Iodine‚ Benedict‚ water
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Cellular Respiration In this lab the effects of different substrates on the rate of cellular respiration is being put to a test which is a very interesting experiment. The three major substrate solutions being used for this experiment are glucose‚ maltose‚ and alanine. The issues this experiment addresses are cellular respiration occur in different stages which are glycolysis‚ citric acid cycle‚ and fermentation. In this lab the experiment determines the effect of different substrates on
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Michelle Kim 2012.1.20 Biology Iso-osmolar Concentration of Carrot Cells Lab INTRODUCTION For a more thorough understanding of this lab introduction‚ the concepts of‚ iso osmolar‚ membrane‚ equilibrium‚ and concentration gradient evaluated. Iso osmolar can be known as the point in which the substance of experimentation faces no change despite the amount of solute inside the solvent( because the solvent and solute concentration is equal. This is where the line on a graph would cross on the
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Diffusion and osmosis go hand-in-hand. Osmosis is generally the same as diffusion‚ however‚ deals solely with water. Osmotic pressure is the pressure of a solution against a semi-permeable membrane to prevent water from flowing into the membrane. In this lab‚ we are going to study tonicity; tonicity is the measure of this osmotic pressure and is the differential of pressure between two solutions separated by a selective membrane. To help identify the relative concentrations of solute particles of different
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