Enzyme kinetics Purpose: The goal of this investigation was to measure the amounts of products made and see the different elements that that affect the rate of breakdown of p-Nitro phenol in the absence or presence of cellobiase….. Methods: Activity #1 The materials used for this activity are as follows: 1.5 mM substrate‚ enzyme‚ Stop solution‚ buffer‚ DPTPs‚ 15 ml conical tubes‚ cuvettes‚ marker‚ beaker‚ distilled water‚ spectrophotometer‚ stop watch. First four 15 ml conical tubes
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Emission Spectroscopy Lab Introduction: According to the Bohr atomic model‚ electrons orbit the nucleus in fixed paths with specific energies. Each path is therefore often referred to as an “energy level”. Electrons possessing the lowest energy are found in the levels closest to the nucleus. Electrons of higher energy are located in progressively more distant energy levels. If an electron absorbs sufficient energy to bridge the “gap” between energy levels‚ the electron may jump to a higher
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Ashley Buss Chemistry Mrs. Hyde 9/27/13 Aspect 1: Our class conducted 3 experiments to demonstrate‚ investigate and experimentally verify the Atomic Laws of Dalton’s Atomic Theory. In our first experiment‚ we measured the mass of 2 objects and then added them and measured the combined mass. We did this to learn about the Conservation of Mass. In our second experiment‚ we took 2 packages of Oreos (regular/double stuf). We weighed the mass to determine the ratio. We did this to model the Law
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Test #2 ANSWERS CHM 101 Part I Multiple Choice (2 points each) 1. Which element is most likely to form three covalent bonds? A) C B) Si C) P D) S E) Se 2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________. A) double; covalent B) double; ionic C) single; covalent D) single; ionic E) triple; covalent 3. Which property could describe a covalent compound? A) It conducts electricity when melted. B) Has a low boiling
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1 Forms of Water 2 • Water consists of an Water is a Polar Molecule oxygen atom bound to -has oppositely charged two hydrogen atoms ends by two single covalent bonds. – Oxygen has unpaired & paired electrons which gives it a slightly negative charge while Hydrogen has no unpaired electrons and shares all others with Oxygen – Leaves molecule with positively and negative charged 3 ends Water molecules form Hydrogen bonds slightly positive charge hydrogen
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Chemistry 140A TOTAL POSSIBLE: 250 Fall‚ 2009 POINTS MISSED: - 0 Second Midterm Exam-250 points 11/19/09 TOTAL: 250 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO.....FILL OUT THE FOLLOWING INFORMATION NOW: . LAST NAME (Print): KEY FIRST NAME (Print): Ima PID: __________________________________________________ SIGNATURE: __________________________________________
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11.5 Transcription Regulation in Eukaryotes Basal level - Low level of transcription Activators - Gene specific transcription factors Enhancers - Regulatory sequences that augment transcription Silencers - Regulatory sequences that diminish transcription Initiator - RNA polymerase II - Promoter‚ together with TATA (TFIID) *Looping enhances transcription Transcription-coupled Repair (TCR) - DNA repair mechanism Response Elements - Enhancers that respond to metabolic
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CHEM RESEARCH TASK 1. INDICATORS Identify and describe some everyday uses of indicators including the testing of soil acidity/basicity. • Indicators are used regularly in chemical laboratories during chemical reactions. One important use is to determine the end point of a titration when an acid reacts with an alkali. The reactants and products of such a reaction are colourless so an indicator is a useful way to visually determine when the reaction is complete. Chemists also need to monitor
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Chem. 6C Midterm 1 Version A October 19‚ 2007 Name__________________________________________ Student Number _________________________________ All work must be shown on the exam for partial credit. Points will be taken off for incorrect or no units. Non graphing calculators and one hand written 3” × 5” note card are allowed. Problem 1 (of 15 possible) Problem 2 (of 26 possible) Problem 3 (of 20 possible) Problem 4 (of 15 possible) Problem 5 (of 6 possible) Problem 6
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OUTLINE 1. Intro- Chemical and biological weapons first appeared in a large quantity in the First World War. Chemical weapons‚ such as sarin‚ nerve gas‚ and mustard gas‚ have to be made in a laboratory. Biological weapons‚ such as Typhus‚ Q fever‚ and Anthrax‚ can be viruses or bacteria. Chemical and Biological weapons have few advantages and so many disadvantages that the advantages aren’t worth the possible effects. 2. Paragraph 1-advantages that can be turned into disadvantages a. Point 1-killing
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