Chapter 2 Integrin Structure and Function Manakan Betsy Srichai and Roy Zent Abstract Integrins are a large family of heterodimeric glycoprotein receptors first discovered over twenty years ago. They exist as two noncovalently bound a- and b- subunits that function as adhesion molecules and play key roles in many biological processes including actin cytoskeleton organization and transduction of intracellular signals regulating cellular functions. Integrins bind a variety of extracellular matrices
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Observance of Artificial Selection: Technical Study of Wisconsin Fast Plants 5th and 6th period AP Biology Due: 12/16/13 Abstract This experiment was used to explore the Theory of Evolution created by Charles Darwin. The use of natural selection was apparent in the artificial modification of an organism ’s traits which aided in this investigation. Through this experiment the Wisconsin Fast Plant was used. It is a fast-growing organism developed to improve the resistance to disease in
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Prokaryotic cells are single celled organisms that were formed at the formation of the earth‚ so are the most basic life forms. The prokaryotes are organised in the ‘three domain system’ and include bacteria and blue-green algae. Prokaryotes live in many environments including extreme habitats such as hydrothermal vents‚ hot springs‚ swamps‚ wetlands‚ and the guts of animals. This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane
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Give an account of protein structure and function Protein structure 1 Proteins consist of amino acids joined together (in chains) 2 A protein is unique because of the sequence of amino acids 3 The amino acids are joined by strong peptide bonds 4 to produce the primary structure 5 Further (weak) hydrogen bonding between acids 6 produce the secondary and tertiary structures A maximum of 4 marks can be gained from this section. Protein function 7 Some proteins are enzymes + named example
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Brain Structures and Functions Viviana N. Reyes ESE370: Learning & the Brain (CXI1409A) Instructor: Charisse Jones March 9‚ 2014 Brain Structures and Functions Many are fascinated by the brain and its functions. Our brain is composed of different units and lobes that work together but each part‚ of course‚ has a special function. We all ask ourselves‚ how is it that we learn? Do our senses have anything to do with getting new information into our brain? Technology
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primary organelles in eukaryotic cells that involve in the transformation of energy‚ thus in production and consumption respectively. The chloroplast is an organelle present only in plant cells and some prokaryotes. At the same time they are absent in animal cells. It’s through the chloroplast that entry of energy to a cell takes place where sunlight is used to trap and convert carbon to sugar‚ which is basically chemical energy that is utilizable by plant cells. Meanwhile‚ the mitochondrion is
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Lipids are made up of carbon‚ hydrogen and oxygen (phospholipids also contain phosphate) and are found in a wide variety of organisms from bacteria to eukaryotes where they perform a wide variety of useful functions. This essay will expand on these functions to describe the role of lipids. There are several types of lipid including triglycerides‚ steroids‚ waxes and phospholipids. Triglycerides are made up of three fatty acids combined with glycerol by an ester linkage meaning they are predominantly
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control as exchange Main function of stomata : Allow enough C02 to enter the leaf to optimize photosynthesis‚ while conserving as much water as possible Structure of stomata * Each stomata consists of a stoma (minute pore) which are surrounded by 2 guard cells. * Stomata closes and opens according to the turgidity of the guard cells * Stomata also allows for cooling of the leaf by loss of water through transpiration to lower leaf temperature * Guard cells open and close to control
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The nucleolus (plural nucleoli) is a non-membrane bound structure. Composed of proteins and nucleic acids found within the nucleus. Ribosomal RNA (rRNA) is transcribed and assembled within the nucleolus. Three major components of the nucleolus are recognized: the fibrillar centers (FC)‚ the dense fibrillar components (DFC)‚ and granular components (GC). The DFC consists of newly transcribed rRNA bound to ribosomal proteins‚ while the GC‚ contains rRNA bound to ribosomal proteins that are beginning
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Plant Structure and Function Plant Body The unique organization of tissues in flowering plants is part of the reason why they are the dominant group of the plant kingdom. Monocots and Dicots Meristems Meristems – region of undifferentiated cells that can divide rapidly. Apical meristems – shoots and tip of roots (primary growth) Lateral meristems – thickening of the cambium (secondary growth) Plant Tissues Plant Tissues Xylem – conducts water and mineral ions; fluids can
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