1a. Aquaporins are membrane proteins that have fourteen various structures however the most common form is that of a homotetramer. The homotetramer is often found in the membrane and composed of four aquaporin membranes. The structural arrangement creates a fifth channel in the middle that allows for gas transportation. 1b. The direction of H2O molecular flow through a channel is determined by an osmotic gradient. 1c. One of the mechanisms that prevents proton channeling is due to the (ar/R) and
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Identifying Biological Molecules with Colorimetric Chemical Tests Objectives Perform a series of accurate tests on biological molecules to detect the presence of carbohydrates and proteins‚ as well as the action of an enzyme on specific molecules. Introduction Unknown biological molecules can be correctly identified using various tests‚ including colorimetric chemical tests. Colorimetric tests are when a chemical reagent‚ such as Benedict’s‚ is used on a substance or solution and a certain
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Biological Macromolecules Lab Cells‚ the fundamental units of life‚ are composed of various combinations of organic macromolecules: carbohydrates‚ lipids‚ proteins‚ and nucleic acids. This lab exercise is designed to show you the qualitative tests commonly used to detect their presence. Objectives Test for the presence of monosaccharides by using the Benedict’s test Test for the presence of starch‚ a polysaccharide‚ by using the Lugol’s iodine test Test for the presence of lipids by using the
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Bachelor of Science Programme International Hospitality Management KEY ADMISSIONS DATES – 2011 INTAKE EHL ADMISSIONS CRITERIA EHL SELECTION PROCESS Academic requirements Candidates should submit a complete application online. Following a first evaluation‚ candidates may be invited to participate in a selection day at EHL. The basic academic requirement is completion of a final secondary school diploma that leads to university admissions in the country where the student completed
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3.1 Proteins Table 3.2 Biuret Test Tube Contents Final Color Conclusions 1 Distilled water Transparent‚ light blue‚ navy Possibly little protein with clear peptide or no protein at all 2 Albumin Dark Purple Proteins are present with purple peptides 3 Pepsin Purplish blue‚ darkish blue Proteins are present with purple or black colored peptides 4 Starch Light blue‚ really clear Possible little protein with clear peptide or no protein at all Our results are correct because water
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Lab Report: Toothpickase and Enzymes September 19‚ 2012 Olivia DePhillips Lab Partner: Joy Morgan Meyers Signature: Introduction Enzymes are biological molecules that catalyze chemical reactions. In enzymatic reactions‚ the molecules at the beginning of the process‚ called substrates‚ are converted into different molecules‚ called products. Almost all chemical reactions in a biological cell need enzymes in order to occur at rates sufficient for life. Like all catalysts‚ enzymes work
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Week 7 Lab Worksheet: Biological Processes‚ Classification of Invertebrates and Bottom ... Page 1 of 6 Week 7 Lab Worksheet: Biological Processes‚ Classification of Invertebrates and Bottom Communities Part 1 of 1 - 99.90001 Points Question 1 of 15 6.66 Points The three families of algaes are:. A.Green‚ Red‚ Grey B.Green‚ yellow‚ brown C.Green‚ red‚ brown D.Mangroves‚ red‚ brown Answer Key: C Feedback: Green algaes are both microscopic (phytoplankton) and macroscopic like sea lettuce. Red
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Molecular shapes play a part in how close two molecules can come to each other as when water molecules provide a solvent for other organic molecules. Cells are dynamic structures with constant activity The carbohydrates are unique in forming long chain polymer and also branching these chains. This is more complicated than protein where only 20 amino acids can form a long single chain. Here there can be numerous kinds of bonding forming a straight chain or long chain polymer. More over the number
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LAB EXERCISE: Diffusion and Osmosis Laboratory Objectives After completing this lab topic‚ you should be able to: 1. Describe the mechanism of diffusion at the molecular level. 2. List several factors that influence the rate of diffusion. 3. Explain why diffusion is important to cells. 4. Describe a selectively permeable membrane‚ and explain its role in osmosis. 5. Define hypotonic‚ hypertonic‚ and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss
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OCEAN COUNTY COLLEGE OFFICIAL COURSE DESCRIPTION DEPARTMENT OF SCIENCE AND ENGINEERING 1. Course Number and Title: CHEM-181 General Chemistry I 2. Semester Hours: 4 Contact Hours: (3 + 2) Lecture Lab 3. Catalog Description This course‚ intended for science majors‚ is the first course of a two-course sequence. Course topics include stoichiometry‚ inorganic nomenclature‚ solutions‚ gas laws‚ thermochemistry‚ atomic structure‚ and chemical bonding. The laboratory work includes
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