WRITTEN SECTIONS OF AP WORLD HISTORY TEST In the free-response section of the AP World History Exam‚ all students are asked to answer three constructed-response (essay) questions: Part A — An essay that requires comparison and analysis of up to ten “documents” which can include texts‚ pictures‚ graphs‚ maps‚ etc.—DOCUMENT BASED QUESTION (DBQ) Part B — An essay question that deals specifically with continuity and change over time (covering at least one of the periods in the concept outline)
Premium Question Africa Sub-Saharan Africa
Name __________________________________ AP Biology Period _________ Date ______________________ AP: LAB-RELATED AP EXAM ESSAYS LAB 1. OSMOSIS AND DIFFUSION ESSAY 1992 A laboratory assistant prepared solutions of 0.8 M‚ 0.6 M‚ 0.4 M‚ and 0.2 M sucrose‚ but forgot to label them. After realizing the error‚ the assistant randomly labeled the flasks containing these four unknown solutions as flask A‚ flask B‚ flask C‚ and flask D. Design an experiment‚ based on the principles of diffusion
Premium Allele DNA Experiment
Enzyme as protein Dr.Samina Haq Quantitative and qualitative test for protein and amino acids • 1. 2. 3. 4. 5. 6. Qualitative test Ninhydrin test Biuret test Xanthoproteic test Millons test Hopkins-cole test Nitroprusside test Quantitative test 1. 2. 3. Spectrophotometric assay Protein shows maximum absorbance at 280nm due to presence of tyrosine and tryptophane. Biuret test shows 540nm Lowry test shows 750nm Ninhydrin Test • Amino acid containing a free
Free Enzyme Amino acid Functional group
reaction involves enzymes. So to understand how bleach works‚ we first understand how enzymes work. Enzymes Enzymes are the most important thing in our lives‚ it makes the world go ‘round! Enzymes are proteins that acts as catalysts and help combine or break down hydrogen peroxide. Imagine a pen with ink inside it‚ when you write‚ ink comes out‚ right? You can draw‚ you can write‚ then when you finish and get your pen off of the paper‚ the ink stops coming out. Enzymes are like that‚ they
Premium Chlorine
Catcher in the Rye Conflict Response Jorge Andres Salgado Oct-7-2010 Holden‚ the main character of the book Catcher in the Rye by J.D Salinger‚ had to face many conflicts during the story. These conflicts connect to him either by secondary character or by himself. Not only do this conflicts affect Holden‚ but if affects the people around him as well. Holden’s attitude became negative because of all the conflicts he faced. “The first thing you’ll probably ask is where I was born and how my
Premium The Catcher in the Rye Last Day of the Last Furlough J. D. Salinger
What is Enzyme? Enzymes are protein that acts as speed up reactions and break down molecules in our body. However‚ different enzymes only work on certain types of molecules. Enzymes can accelerate the reactions by more than one million times.(3) In our human body‚ there are a total about forty thousand types of enzymes and each catalyzes different kind of molecule.(3) The molecules that enzymes help to accelerate is called substrates‚ and when enzyme is combined together with the substrate‚ it
Premium Enzyme
tissue samples will give better responses if both Mg2+ and Zn2+ ions are included in the reactions Keywords: Alkaline phosphatase; kinetics; Enzyme-cofactor interaction; synergism * corresponding author. Email: femijohn@gmail.com 43 INTRODUCTION The roles of metal ions in metalloenzymes include direct participation in catalysis‚ stabilization of protein structure and regulation of enzymatic activity. Membrane alkaline phosphatase (ALP) is a metal-containing enzyme that serves as a good model
Premium Enzyme Catalysis Alkaline phosphatase
There are approximately 40‚000 enzymes living in one human cell‚ each responsible for a chemical reaction. Enzymes are complex 3D protein molecules created by amino acids‚ forming a unique sequence that produces hydrogen bonds‚ eventually formulating an enzyme within plants and animals (Boyle & Senior‚ 2002). Working alongside other molecules‚ they uphold a stable reaction system. The function of an enzyme is to aid and increase chemical reactions and organise metabolism‚ while maintaining homeostasis
Premium Enzyme Chemical reaction
it’s lowest to do so. However‚ in cold solutions the starch will take longer as it will in temperatures beyond 40 degrees. Once it reaches this point‚ the break down will either take a very long period of time or have no reaction at all as enzymes are denatured at a certain point. Materials: · 4 x test tubes · 5mL Diastase · 5mL Water · 10mL 2% Starch Suspension. · Pipette · 2 x Spotting tiles · Large Beaker filled with water of assigned temperature · Thermometer
Premium Enzyme Chemical reaction Amylase
totally free essay resources online that are designed to provide professionally written papers for those who are in need of essay-writing help or inspiration. These sites provide papers that are written in any style‚ with proper word usage‚ grammar and sentence structure. The essays are written to the style of the desired topic and also provide a list of citations‚ an annotated bibliography‚ or a complete literature review depending on the subject material of the essay. Some of the free essays available
Premium Writing Essay