BIURET FOOD TEST FOR PROTEINS molecules consisting of one or more chains of amino acids.Proteins are complex molecules that react differently to many compounds but are also fragile and cannot withstand high temperatures or strong acids and bases without degrading. The Biuret Method‚ or biuret test‚ is used to detect the presence of peptide bonds. It has this name because it reacts positively to the biuret molecule’s peptide bonds. Correctly evaluating the number of peptide bonds is a step towards
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Chemistry Practical: Activity Series of Metals Introduction: The chemical activity of a metal is directly related to its practical use. In this investigation you will investigate the chemical activity of metals with oxygen‚ water‚ acid and alkali‚ to rank metals in order of their activity. Aim: To observe the reactivity of metals in order to determine the activity series of metals. Risk Assessment: In this investigation‚ hydrochloric acid solution is used which is toxic by all routes of
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Carbon Compounds Activity 1: Organic Compounds: Are they Useful? Objective: Recognize the uses of common organic compounds. Materials: paper and pen‚ pentel pen‚ manila paper Labels or Pictures of the following products: gasoline‚ acetone‚ kerosene‚ acetic acid‚ LPG‚ ethanol Procedure: 1) With your group mates‚ use the labels/pictures of the materials to answer the following questions: a.) Complete the table about the uses of the compounds. Indicate using a check mark the uses of
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School of the Sacred Heart of San Jose City 2126 Maharlika Road‚ Abar 1st‚ San Jose City SECOND QUARTER TEST SCIENCE 3 A. Y. 2013 - 2014 ______________________________________________________ ---------------------------------------------------------------------------------- ______________________________________________________ Score: _________ I. Check (√ ) the proper ways to take care of plants and cross ( x ) that do not. ________1. Water
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ARE EXAMINATIONS A TRUE TEST OF ONE’S ABILITY? Indeed examinations are regarded by the teachers and other prominent intellectuals as a test of merit .Students prepare for the examinations‚ days and months in advance. The day of the examination is always awaited with a mixed feeling. There is a fear of facing a tough paper and there is also a sense of relief to know that once the papers are over‚ there can be enough time to play and enjoy. Examinations are a bug-bear. They are like electric shocks
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Variant I NAME__________________________ GROUP_________________ 3.FILE 3 LISTENING 1 TASKS PRESENTER 1 LISTEN TO THE NEWS BULLETIN. MATCH THE FIVE PEOPLE WITH A WORD FROM THE BOX. THERE ARE THREE WORDS THAT YOU WILL NOT NEED. burglar pickpocket mugger drug dealer bank robber victim shoplifter witness 1 Jeremy Maguire was a ______. 2 Stephanie Flamstead was a ______. 3 Penny Green was a ______. 4 Sally Green was a ______. 5 David Clarke was a ______.
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Biology: Concepts and Connections‚ 6e (Campbell) Chapter 4 A Tour of the Cell Multiple-Choice Questions 1) Which of the following statements about cells is true? A) All cells have cell walls. B) All cells have internal structures that move. C) All cells are attached to other cells. D) All cells are motile. E) All cells have static organelles. Answer: B Topic: Opening Essay Skill: Factual Recall 2) Light microscopes A) can
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EFFECT OF TEMPERATURE‚PH AND SUBSTRATE CONCENTRATION ON ENZYME ACTIVITY | Aim To investigate the effect of Temperature‚Ph and substrate concentration on the rate of enzyme activity. Hypothesis
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LABORATORY REPORT (Click on the Save a Copy button on the panel above to save your report) Activity: Name: Instructor: Date: Enzyme Activity cheryl yelton November 30‚ 2014 Predictions 1. Sucrase will have the greatest activity at pH 6 2. Sucrase will have the greatest activity at 40 °C (104 °F) 3. Sucrase activity increases with increasing sucrose concentration. Materials and Methods Effect of pH on Enzyme Activity. 1. Dependent Variable. amount of product (glucose and fructose) produced 2. Independent
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ĐỀ SỐ 1 SECTION 1: Language usage (30 marks) Circle the correct answer 1. In the long term ........... is due to increase in the price of raw materials. This is the situation where prices rise to keep up with increased production cost. a. devaluation b. inflation c. recession d. crisis 2. In a accordance with our usual terms‚ payment will be by …………This is a letter from a bank authorizing payment of a certain sum to a person or a company. a. cheque b. banker’s draft c. letter of credit d
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