Proteins Lipids And Nucleic Acids Professor Anthony Depass Biology 1 9/25/14 Introduction: By completing lab exercise 6 : Biologically Important Molecules‚ we are able to perform tests such as the Benedicts Test for Reducing Sugars‚ Iodine Test‚ Biuret Test‚ Sudan IV Test‚ and lastly the Grease-Spot Test that detect the presence of biologically important carbohydrates‚ protein lipids and nucleic acids. Most known compounds in living organism are if fact carbohydrates‚ lipids‚ proteins
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function of the mordant iodine in a Gram staining procedure? A mordant causes the crystal violet to run. A mordant fixes the bacteria to the slide. A mordant keeps dye attached to an object. All of the above 5. What is the order of reagents used in the Gram stain? crystal violet‚ iodine‚ safranin‚ alcohol alcohol‚ crystal violet‚ iodine‚ safranin iodine‚ crystal violet‚ safranin‚ alcohol crystal violet‚ iodine‚ alcohol‚ safranin crystal violet‚ safranin‚ alcohol‚ iodine 6. The presence of
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Bactine Original First Aid Liquid (Bactine)‚ and Povidone-Iodine Solution‚ 10% Topical Microbicide Antiseptic (Iodine) are an appropriate antiseptic to can kill a sample bacterial contaminant found in the local environment‚ and if so‚ which is the most effective? The purpose of this experiment is to determine the antibacterial effectiveness of Scope‚ Listerine‚ Bactine‚ and Iodine in relation to each other. Scope‚ Listerine‚ Bactine‚ and Iodine each are believed to be effective antiseptics: * Scope
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Grouping elements with similar chemical properties together Date: 4.10.2012 Objectives The objective of this experiment is to experimentally investigate which elements show similar chemical properties. Chemical principle Calcium is a chemical element with symbol Ca and atomic number 20. Calcium is a dull gray‚ silver solid under standard conditions. Calcium atoms have an electron configuration of (2‚ 8‚ 8‚ 2) and 2 outermost shell electrons. Calcium is in group 2 and period 4 of the
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Benedict’s solution is added to each test tube. Both test tube are heated together in the water bath for two minutes. The result is recorded in Table 1. 2. A few drops of fresh solution A and B are added separately spaced on a white tile. 1-2 drops of iodine solution are added on each solution. Observations are recorded in Table 1. 3. 2 ml of solution B is pipetted into each of four boiling tubes. The tubes are labelled 1‚ 2‚ 3and 4 respectively near mouth of tube. 4. Tubes 1 and 2 are placed in
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the mass of lead nitrate and the ability of amylase to convert starch into maltose. Variables: Independent Variable: The mass of lead nitrate dissolved in each of the solutions. Dependent Variable: The change in the color intensity of the iodine. Controlled variable: Time: the reaction was allowed to proceed for twenty minutes. Temperature: the water bath was set at 40˚C. This was to provide the optimum conditions for the enzyme activity.
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Lab” was used to answer the question “What organic molecules will be found?” The organic molecules being sugar‚ starch‚ and protein. The chemicals that are used in this experiment are Iodine‚ Biuret solution‚ and Benedict’s solution. Iodine is an element on the periodic table. It has an atomic number of 53. Iodine is used very often in natural history and is used to find starch‚ which will be needed in order to conduct this experiment. Biuret Solution is a mixture of copper sulfate and potassium
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INTRODUCTION Enzymes are a protein serving as a catalyst‚ a chemical agent that changes the rate of the reaction without being consumed by the reaction. Enzymes are proteins made up of long chains of amino acids. These form complex shapes. The enzymes are individuals‚ like the different players on a ball team‚ they have different specific structures and jobs. As one ball player may be very tall and one short‚ the specific different shape of the active site on an enzyme is unique and prepares it
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Class 12 – Biology – Experiment 12 Experiment No. 12 Aim- To study the effects of temperature on the enzymatic activity of salivary amylase on substrates starch. Materials required- Test tubes‚ beakers‚ pipettes‚ funnels‚ thermometer‚ cotton‚ starch‚ iodine‚ potassium iodide‚ sodium chloride‚ thermocol box‚ buffer solution of pH 6.8 & match box. Principle- Salivary amylase is an amylolytic enzyme found in saliva released from salivary glands. All the enzymes show optimum enzymatic activity around 37°
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decontaminated area of the skin in which to make the needle puncture. EQUIPMENT/SUPPLIES • Gloves • Commercially packaged alcohol pads or gauze pads soaked in 70% (isopropyl alcohol) • Blood culture decontamination kits/swabs (e.g.‚ Chlorhexidine‚ iodine) PREPARATION 1. Identify the patient properly. 2. Wash or sanitize your hands using appropriate agents‚ dry them‚ then put on gloves. PROCEDURE 3. Once the site is selected‚ cleanse it with a commercially packaged alcohol pad or with a gauze
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