(10.27/18.39) x 100% = 55.83 % Analytical Data: -Boiling Point: The liquid had a boiling point between 101°C and 102 °C. According to Paula‚ Lampman‚ Kriz‚ and Engel‚ Introduction to Organic Techniques‚ 2004 3rd Ed. Experiment 24: Preparation of 4-Methylcyclohexene‚ pg 193 the boiling point of the compound should be between 100 and 105 °C. Our value is very close indicating a pretty pure substance. Impurities in the desired substance can alter the boiling point.
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N08/4/BIOLO/SPM/ENG/TZ0/XX+ 88086004 Biology Standard level PaPer 1 Monday 17 November 2008 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • • • Do not open this examination paper until instructed to do so. Answer all the questions. For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8808-6004 13 pages © International Baccalaureate Organization 2008 –– 1. Which of the following characterizes tissues? A. B. C. D. A group of cells
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A Secure E-Exam Management System Jordi Castell` -Roca† ‚Jordi Herrera-Joancomarti‡ and Aleix Dorca-Josa§ a † Rovira i Virgili University of Tarragona‚ Dept. of Computer Engineering and Maths‚ Av. Paisos Catalans‚ 26‚ E-43007 Tarragona‚ Catalonia ‡ Universitat Oberta de Catalunya‚ Av. Tibidabo 39‚ 08035 Barcelona § Universitat d’Andorra‚ Placa de la Germandat‚ 7‚ AD600 Sant Juli` de L` ria‚ Principat d’Andorra ¸ a o E-mail: † jordi.castella@urv.net‚ ‡ jordiherrera@uoc.edu‚ § adorca@uda.ad Abstract
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Biology exam review 2.1 Kingdom King Phylum Philip Class Came Order Over Genus Germany Species South Domain Bacteria Archea Eukarya Kingdom Eubacteria Archeabacteria Protista‚ Fungi‚ Plantae‚ Animalia. # of cells Prokaryote Prokaryote Eukaryote Cell structure Cell walls made of peptidolglycan (coat of sugars) Cell walls without peptidoglycan Fungi-cell walls with chitin. Protista-cell walls of cellulose in some‚ and in others chloroplasts. Plantae-cell walls
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For each question‚ choose your answer‚ and then give the rationale behind your choice. This will give you the opportunity to earn up to 10 points to be directly applied to exam 2. This must be submitted by the beginning of class 8/2. Multiple Choice Identify the choice that best completes the statement or answers the question. ___B_ 1. A 45-year-old client with excess fluid volume because of an acute kidney dysfunction is placed on a 1‚000 ml fluid restriction per 24-hour period. The client
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negative. A substance with a pH of 6 is called a. an acid. In chemical reactions‚ atoms are c. rearranged. The energy needed to get a reaction started is the b. activation energy. A substance that speeds up the rate of a chemical reaction is called a. a catalyst. What advance in technology made the discovery of cells possible? d. The microscope Which of the following is NOT a principle of the cell theory? c. Very few cells are able to reproduce. Not all cells are alike. Which of the following
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agriculture‚ and industry. C. Fundamental changes in our society are occurring as a result of genetic engineering. II. Making recombinant DNA Overview: Isolate DNA à Cut with restriction enzymes à Ligate into cloning vector à transform recombinant DNA molecule into host cell à each transformed cell will divide many‚ many times to form a colony of millions of cells‚ each of which carries the recombinant DNA molecule (DNA clone) (From: AN INTRODUCTION TO GENETIC ANALYSIS 6/E BY Griffiths‚ Miller
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Authentication of e-Exams In the past fifteen years the use of Internet technologies has been substantially growing for delivery of educational content. E-learning environments have been incorporated in many universities for the delivery of e-learning courses. However‚ opponents of e-learning claim that a central disadvantage of such teaching medium is the growing unethical conduct in such environments. In particular‚ opponents of e-learning argue that the inability to authenticate exam takers is
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Biology 4U Exam Review Intro to Biochemistry Types of bonding: Ionic Results from the attraction between two oppositely charged atoms or molecules. They must lose or gain electrons to become charged. For example‚ a sodium molecule and a chlorine molecule form an ionic bond to create sodium chloride (NaCl) Covalent Results from the sharing of one or more pairs of valence electrons to create a stable molecule. For example‚ the covalent bonding of hydrogen ions creates hydrogen gas (H2)
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isolates it from damaging reactions A) endoplasmic reticulum B) nucleus C) nucleolus D) golgi body Points Earned: 2.0/2.0 Correct Answer(s): B 3. A buffer protects cells against: A) changes in pH B) excessive weight gain C) salt D) heat damage Points Earned: 2.0/2.0 Correct Answer(s): A 4. Two or more chemically bonded atoms of the same or different elements make up a/n: A) tissue B) element C) protein D) molecule Points Earned: 2.0/2.0 Correct Answer(s): D
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