------------------------------------------------- Glossary acids molecules that have a pH level less than 7‚ dissociate in water‚ and release hydrogen ions (H+) action potential the electrical potential determined by unequal ion distribution when a particular site on the neuron membrane is conducting an impulse; normally about +40 millivolts activation energy the amount of energy required before a chemical reaction can occur; this amount is reduced when an enzyme is present active process
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Introduction and Chemistry of Life Anatomy: the study of structure or shape of body parts and their relationship to each other. Physiology: the study of function (how the parts work) Levels of structural organization: There is a hierarchy of structural complexity‚ beginning with the simplest or chemical level and culminating with the highest level-the whole organism Chemical level – atoms (and their parts)‚ and combinations of atoms called molecures Cellular level – cells are the basic structural
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1) Why was the use of the telescope by Galileo‚ 400 years ago‚ such a significant event in the history of astronomy? (120 words‚ 2 marks) The introduction of Galileo’s refracting telescope was a significant event in history because of the conclusions Galileo proved using his instrument. He disproved the Roman Catholic Church’s belief that the Earth was at the centre of the universe‚ instead of the Sun. He observed the moon-like areas on Venus that could only be true if the Sun was at the centre
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chromosomes indicates cosexuality is the ancestral angiosperm state and sex chromosomes evolved repeatedly and quite recently. In Silene ( Family Caryophyllaceae) some species are gynodioecious and others are hermaphroditic. ITS sequences of nuclear ribosomal RNA genes of Silene species indicates two origins of dioecy.Molecular clock datas suggest an age of < 20 million years for the heteromorphic sex chromosomes of the species Silene latifolia and S. dioica which means separate sexes may have evolved
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activities of microorganisms that are beneficial to humans • describe prokaryotic and eukaryotic morphology and the distribution of microorganisms among the three domains in which living organisms are categorized • discuss the origin of life‚ the RNA world‚ and the evolution of microorganisms CHAPTER OUTLINE I. Microbiology—Introduction A. Microbes are found everywhere and are indispensable for cycling of essential elements on earth B. Most microbes are beneficial to society by producing foods
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Produced by cell clusters in the pancreas called the Islets of Langerhans‚ insulin is a hormone that regulates glucose concentration in the blood. It is a protein synthesised and stored by beta cells‚ which secrete it in surges responding to changes in glucose levels. (Hardin‚ Bertoni and Kleinsmith‚ 2012) Fig 1. The Pancreas and Insulin |Source: University of Maryland (2011) | | |
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On researching new developments in the treatment of cystic fibrosis‚ I came across a very interesting article: “Ribosomal Stalk Protein Silencing Partially Corrects the ΔF508-CFTR Functional Expression Defect.” In the article‚ Viet et al1 reveal the potential application of the silencing of RPL12 (Ribosomal Protein L12)‚ to correct the ΔF508-CFTR biogenesis defect. As you know‚ cystic fibrosis is caused by a defect in the CF transmembrane conductance regulator (CFTR gene)‚ or more specifically‚ mutations
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Experiment 22 Laboratory to Biology III Diversity of Microorganisms / Wintersemester / page 1 Experiment 22 Isolation of plasmid-DNA from bacteria and PCR Advisor Konrad Egli: kegli@botinst.unizh.ch Reading Chapters in BBOM 10th: 10.8 BBOM : Madigan M.T.‚ J.M. Martinko and J. Parker: "Brock - Biology of Microorganisms"‚ 10th Edition (2003)‚ Prentice Hall. Objectives Background • Isolation of plasmid-DNA from different bacteria clones • Handling of bacteria clones
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molecules Correct Miller and Urey showed that under conditions postulated to have existed on early Earth‚ it was possible to spontaneously form essential organic molecules. Chapter 25 Pre-Test Question 2 Part A Why do some scientists believe that RNA‚ rather than DNA‚ was
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Anatomy & Physiology I Course Review for Final Review: 1. The Levels of Organization: Chemical Level: atoms (elements) >>>> molecules (two or more chemicals together) Cellular Lever: individualized (specialized cells) Tissue Level: tissues (groups of cells and materials surrounding them) Organs Level: different tissues that join together as a structure for a specific function System Level: related organs with a common/synergistic function Organism Level: a living
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