Name Period Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4
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1. The woman in the photograph is Henrietta Lacks. She had seen the picture many times in magazines and science textbooks‚ on blogs and laboratory walls. Rebecca Skloot may start to write this book to know about Henrietta Lacks. She was staring at the photo for a long time and she always had wondered about Henrietta Lacks’ life story. Rebecca Skloot went to an alternative school after she had failed her freshman year at a regular public high school. She took a biology class at a community college
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Introduction Enzymes are catalytic proteins. The purpose of a catalyst is to speed up metabolic reactions by lowering the free energy of activation or activation energy. Activation energy is known as the amount of energy needed to push the reactants over an energy barrier‚ so that the downhill part of the reaction can begin (Campbell 151). In an enzyme catalyzed reaction‚ the enzyme binds to its substrate‚ which is the reactant an enzyme acts on. In the reactions‚ the enzymes are very specific
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CHAPTER 14 1. Norm of reaction: the phenotypic range that a genotype is associated with due to environmental influences. 2. Multifactorial: characters that have many factors‚ both genetic and environmental‚ collectively influence phenotype. 3. Pleiotropy: when a gene controls multiple phenotypic effects 4. Epistasis: When a gene at one locus alters the phenotypic expression of a gene at a second locus 5. Carrier: a person who is heterozygous for a recessive disease and therefore
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AP Bio Lab Report Osmosis and Diffusion Introduction When a substance is released into an area‚ the random movement of its molecules results in a multitude of collisions. These collisions‚ in turn‚ lead to a dispersion of the molecules. The overall movement of the molecules will be from an area of high concentration‚ where there will be more collisions‚ to areas of low concentration‚ where the number of collisions will be much less. This process of dispersion will continue until there is no
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\ Chapter 23 Reading guide 1. what is the smallest unit of evolution and why is this important to understand? The population is the smallest unit of evolution . This is important to understand because it keeps clear what is evolving. 2. Define the following terms: a. Microevolution: evolutionary change below the species level; change in the genetic makeup of a population from generation to generation. It is evolutionary change on its smallest scale b. Population: a localized group
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4A- The hypothesis was partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because
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Energy and Metabolism Chapter 6 Energy and Metabolism • Organisms require the constant input of free energy and matter for growth‚ reproduction‚ and maintenance of living systems • Life requires a highly ordered system ▫ What is free energy? Energy available to do work in any system G What other types of energies do cells use? • Potential ▫ Stored energy ▫ Chemical • Kinetic ▫ Energy of motion Thermal Energy • • • • All forms of energy can be converted to heat Thermodynamics
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Ben Milam January 29‚ 2013 A.P. Biology Chapter 29 “Do You Understand” Questions Chapter 29.1: 1) The roles of the blood plasma and the interstitial fluid in serving the needs of the body are to exchange materials and nutrients with the cells it surrounds. These two extracellular fluids interrelate because the plasma is 20% of all extracellular fluid and the interstitial fluid is the remaining 80%. 2) A) Epithelial tissues are sheets of densely packed‚ interconnected epithelial cells
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Plant Pigments and Photosynthesis Problem: We are going to separate and identify pigments and other molecules from cell extracts through a process called chromatography. We will also test the theory that light and chloroplasts are required for light reactions to occur. Background: Pigments are chemical compounds which reflect only certain wavelengths of visible light. This is what makes them seem colorful. Many things contain pigments including flowers‚ corals‚ and even skin. More important than
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