AQA Exam-style Questions Cell activity 1. a) - A : nucleus - B : mitochondria - C : ribosomes - D : plasmids b) The nucleus controls all activities within the cell. It also contains genetic materials used to create new cells. c) Plasmids and genetic materials in cytoplasm d) i 75 ii 28 iii 0.15 e) Protein can be used to build up cells as it is a structural component of every cells. It is also an enzyme as well. f) There are no mitochondria in bacterial cells because they are
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Introduction To differentiate between bacteria‚ fungi and yeast‚ we plant four different microbes in plates under the same environment for one week and compare the growth of the four microbes by macroscopic and microscopic observation. Meanwhile‚ the diversity of bacteria and fungi in humans‚ the environment and wood could be observed. In addition‚ the four substrates are cultured in two media‚ MEA and NA‚ under the same condition. Thus‚ how nutrients affect the growth of bacteria and fungi could
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Abstract Plant-based repellents have been used for generations in traditional practice as a personal protection measure against host-seeking mosquitoes. Knowledge on traditional repellent plants obtained through ethno botanical studies is a valuable resource for the development of new natural products. Recently‚ commercial repellent products containing plant-based ingredients have gained increasing popularity among consumers‚ as these are commonly perceived as “safe” in comparison to long-established
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Bio Study Guide EXAM 1 Chapter 1 Characteristics of living things (know the 7 characteristics) 1. Order 2. Regulation- controlling body temp 3. Contain DNA- evolution 4. Energy Processing – food 5. Response to the environment- adapting 6. Growth and development 7. Reproduction Classification of organisms (D.K.P.C.O.F.G.S) Domain‚ Kingdom‚ Phylum‚ Class‚ Order‚ Family‚ Genus‚ Species Prokaryotes vs. Eukaryotes (know differences) Prokaryotic cells: DO NOT have a nucleus but DOES
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2 Y Nutrition in Animals food into simpler substances is called digestion. You have studied in Class VI that food consists of many components. Try to recall and list them below: 1. ______________________ 2. ______________________ 3. ______________________ 4. ______________________ 5. ______________________ 6. ______________________ no t The components of food such as carbohydrates are complex substances. These complex substances cannot be utilised as such. So they are broken down into
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Microbiology and Process Analysis laboratory 25/10/2013 Group 1 Microbiology laboratory Abstract The lab exercises were divided into three different analysis; microscopy‚ soil microbiology and bacterial growth. The main aim of laboratory work with Escherichia coli and soil sample was to introduce students to bacterial growth in pure culture and soil microbial flora. The experiment of bacterial growth in pure culture using optical density
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Biology Revision summer 2012 1-Characteristics of living organisms Nutrition- taking in of nutrients which are organic substances and mineral ions ‚ containing raw materials or energy for growth and tissue repair ‚ absorbing and assimilating them . Excretion- the removal from organisms of toxic material‚ the waste products of metabolism and substances in excess of requirement . Respiration- the chemical reactions that break down the Sensitivity- The ability to detect or sense changes in the
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The CELL The CELL Robert Hooke (1635-1703) Cork cells - the first person to see and name CELLS cces2013 (1665) 2 The CELL Robert Brown (1773-1858) - Discovered and named the nucleus (1833) cces2013 3 The CELL Matthias Jakob Schleiden (1804-1881) studied plant tissues and concluded that all plants are aggregates of individual cells which are fully independent (1838) cces2013 4 The CELL Theodore Schwann (1810-1882) studied animal tissues and concluded that all
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Ingredients All vegetable ingredients are Halal except intoxicating ones Animal derived ingredients should be from animals slaughtered by Muslims or from fish HFCE 8 Questionable Ingredients Gelatin: Pork‚ Beef‚ Fish Glycerin/glycerol Emulsifiers: Animal‚ Vegetable Enzymes: Animal‚ Microbial‚ Biotech Dairy Ingredients‚ whey‚ cheese Ethyl Alcohol‚ Alcoholic Drinks Animal Protein/Fat Flavorings and Compound Mixtures HFCE 9
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eXPRESS Polymer Letters Vol.3‚ No.6 (2009) 366–375 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.46 Starch-based completely biodegradable polymer materials D. R. Lu‚ C. M. Xiao*‚ S. J. Xu College of Material Science and Engineering of Huaqiao University‚ Quanzhou‚ 362021‚ P. R. China Received 21 February 2009; accepted in revised form 30 March 2009 Abstract. Starch is a natural polymer which possesses many unique properties and some shortcoming simultaneously
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