related compounds‚ including isomers. For example‚ the enzyme sucrase will only act on sucrose and will not bind to any other disaccharide. The molecular recognition of enzymes is due to the fact that they are proteins‚ which are defined as being macromolecules with unique three-dimensional conformations. Therefore‚ the specificity of enzymes is a consequence of its shape which results from its amino acid sequence. The enzyme binds to the substrate at a region known as the active site‚ a groove on the
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In this report i will be writing brief description on the functions of the main cell components of the body cell. The cell membrane : is something that lets some things in and some things out of the cell. It is an outer cover for the cell. If the cell membrane was non existences the cell would spill all over the place. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell‚ while keeping other substances out. It is composed of a thin
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laboratory assistant in a research laboratory may also be helpful. Molecular biologists may also want to consider postdoctoral work when considering a research career. Daily Activities/Responsibilities: The field of molecular biology studies macromolecules and the macromolecular mechanisms found in living things. Molecular biologists design molecular laboratory experiments‚ oversee their execution‚ and interprets the results. Molecular biologists conduct research on mechanisms of gene expression
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Genetics‚ Evolution and Diversity (GED) Prelim 1st Sem AY 2013-14 Research Portfolio 1. Discuss in words or contrast in graphical/sketch form the differences of Prokaryotic cells from the Eukaryotic cells. 2. Describe in words or show in graphical/sketch form the general features of the cell Nucleus. 3. Briefly discuss each of the five functions of cell nucleus. 4. Illustrate in words or graphical/sketch form the structure (highlight the nucleotide components) of the DNA
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Cell Membrane Simple diffusion is when a small‚ non-polar molecule passes through a lipid bilayer. It is classified as a means of passive transport. In simple diffusion‚ a hydrophobic molecule can move into the hydrophobic region of the membrane without getting rejected. Simple diffusion does not involve a protein. An example of simple diffusion is osmosis. Hydrophilic molecules cannot participate in simple diffusion because they would move into the hydrophobic region of the membrane and be
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POLYMER DATA HANDBOOK *Home *Browse/Search Contents *Browse by Polymer Class *Browse the Index *Online help Copyright © 1999 by Oxford University Press‚ Inc. EDITED BY JAMES E. MARK‚ UNIVERSITY OF CINCINNATI PUBLISHED BY OXFORD UNIVERSITY PRESS The online version of the Polymer Data Handbook includes key data on over two hundred polymers. Please note that entries are presented as PDF files and can only be read using Adobe Acrobat Reader Version 3. If you do not have the freeware reader‚
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However‚ not all macromolecules enter the cell through the same way. The cell is comprised of mostly cytoplasm and floats in an aqueous‚ watery medium. The cell’s membrane functions as a hydrophobic phospholipid bilayer barrier between both aqueous regions. The heads of the phospholipids are hydrophilic‚ and thus face the aqueous regions to the inside and outside of the cell‚ while the hydrophobic tails face inside. Because the inner region of the cell membrane is hydrophobic‚ macromolecules that are also
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Bio 1011 Cells Exam #1 Answer the multiple choice questions on the scantron sheet. Select the one choice that best answers the question. Answer the short answer questions in the space provided at the end of the exam. 1. Which of the following is the SMALLEST? a. a bacterium b. a ribosome c. a hexose sugar d. a water molecule e. a yeast cell 2. The four main families of small inorganic molecules in cells are a. salts‚ sugars‚ fatty acids‚ amino acids‚ nucleotides b.
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Truman College Department of Biology Biology 121 Fall ‘14 Francisco Diaz de Leon Assistant Professor Office 2633 Phone: 773.907.4394 Email: fdiaz-deleon@ccc.edu Office Hours: Tuesday and Thursday 8:30 to 11:00 AM; Monday and Wednesday 11 AM to 12 PM; or by appointment. NOTICE: The best way to communicate with me outside the classroom is via email. I do not check phone messages regularly. Course Description: Cellular and molecular biology of the cell. Introduction to biochemistry
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Amino acids are the building blocks of proteins. Amino acids bind together to form polypeptide chains‚ and these polypeptides fold and coil together into specific conformations to form proteins. There are 20 different amino acids‚ each amino acid consisting of four distinct partners. The first is a carboxyl group. A carboxyl group has very weak acids that are able to donate hydrogen ions to biological reactions. The second partner is the amino acid group. Amino acid groups act as the base which‚
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