Biology 240. Spring 2014. Exam 3. Chapter 9. Proteins and Their Synthesis Four levels of protein structure (page 313) Primary: linear sequence of amino acids in polypeptide chain Secondary: local regions of polypeptide chain fold into specific shapes (shapes arise from the bonding forces between amino acids close in proximity of linear sequence Tertiary: folding of the secondary structure Quaternary: protein composed of two or more separate folded polypeptides (subunits) joined by weak
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Biology: Concepts and Connections‚ 6e (Campbell) Chapter 4 A Tour of the Cell Multiple-Choice Questions 1) Which of the following statements about cells is true? A) All cells have cell walls. B) All cells have internal structures that move. C) All cells are attached to other cells. D) All cells are motile. E) All cells have static organelles. Answer: B Topic: Opening Essay Skill: Factual Recall 2) Light microscopes A) can
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Cell Size Control David A Guertin‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA David M Sabatini‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA Growth in biological systems is defined as the accumulation of mass‚ which leads to an increase in size. In this article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article
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v=rB_8dTuh73c&feature=share&list=UUEik-U3T6u6JA0XiHLbNbOw Basic Learning objectives After completing the readings and practice exercises‚ students should be able to: Describe the process of binary fission. Describe the features and components of eukaryotic chromosomes and sister chromatids. Describe the phases of the eukaryotic cell cycle. Describe the events that take place during interphase. Summarize events that occur during the five phases of mitosis. Compare cytokinesis in plants and animals. Understand the function of meiosis
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the past decade‚ the combination of Hydraulic Fracturing and horizontal drilling has opened up shale deposits across the country and has brought a large quantity of natural gas to new regions. Some places in the nation that practice the use of Hydraulic Fracturing are • Barnett Shale‚ FT. Worth Basin‚ Texas. • Fayetteville Shale‚ Arkoma Basin‚ Arkansas. • Marcellus Shale‚ Appalachian Basin. • Utica Shale‚ Appalachian Basin. A significant part of the drilling has occurred
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THE MOLECULAR BASIS OF INHERITANCE I. History A. Discovery of “transformation” – a change in genotype and phenotype due to the uptake of external DNA by a cell 1. Griffith 1920s did experiments with Streptococcus pneumoniae (p294 fig16.2) a. took two strains of S. pneumoniae‚ one virulent‚ one not b. heat killed virulent strain‚ then mixed them with the living nonvirulent strain c. living nonvirulent strain became virulent d. nonvirulent strain took on virulent strain’s DNA became virulent
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AP BIOLOGY EXAM ESSAY (FREE RESPONSE) QUESTIONS General directions: Answers must be in essay form. Labeled diagrams may be used to supplement discussion‚ but in no case will a diagram alone suffice. It is important that you read each question completely‚ and answer each section of the question. When giving examples‚ the first ones you give will be the ones graded. (if two examples are asked for‚ and you write about 4‚ make sure the first two are the best ones; they are the only ones counted
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Evolution as a theory * Theory- in science‚ a well substantiated explanation of some aspect of the natural world Evolution- the accumulation of inherited genetic changes within populations over generations * Does not refer to changes that occur in an individual within its lifetime * Not limited to speciation that may only occur over long periods of time * Can occur over a few generations‚ and is most commonly expressed as an adaptation to a changing environment or the change in allele
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this would be a solution the ever rising prices of oil and natural gas due to abundance of potential shale gas reserves. Hydraulic fracturing is not a method used for extraction of conventional natural gas. ‘Shale gas’ is a form of natural gas‚ yet different from the conventional natural gas. Shale gas is not found in a crude oil bed unlike natural gas‚ whereas it is trapped in rocks. Although shale gas has been produced for over a hundred years in the United States‚ it only recently became a principle
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and mechanical winning of coal rocks (Jin et al.‚ 2014). Brittleness is one of the significant rock parameters in shale reservoirs. It recognizes as key information to evaluate the capability of formation to create an effective fracture network that conducts the hydrocarbons to each borehole. Thus differentiating brittle from ductile rocks has been the key to unique success in shale gas reservoirs. In the lab scale‚ The Brittle failure is occurred when the ability of the rock to resist load decreases
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