Claire Kerns Bio Per.1 2-13-13 Cancer reflection Is cancer a disease due to genetics or environment? Cancer is a disease both caused by genetics and environmental factors. Each person has either proto-oncogenes or oncogenes. These are the genes that are responsible for regulating cell division. When a person has an oncogene it is a mutation of a proto-oncogene. The oncogene (dominant gene) tells the cell to continuously divide. This can be a problem if the cell is cancerous. Cancer cells
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Cell Size: Is Bigger Better? Problem: Why are cells small? Objective: To see the relationship between cell size and diffusion of materials. Hypothesis: If we cut three different sizes of cells‚ then the smallest one will survive the longest due to its sufficient permeable membrane. Cube | Total Volume (cm^3) | Surface Area (cm^2) | Index SA/VOL | 3 | 27 | 54 | .5 | 2 | 8 | 24 | .33 | 1 | 1 | 6 | .16 | Index of Cubes Cube Index SA/VOL Surface Area to Volume Cube | Total
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using protein carriers. Examples of active transport are endocytosis‚ exocytosis‚ and phagocytosis. Passive transport does not require energy it is powered by the concentration gradient of the molecule. Examples of passive transport are diffusion‚ facilitated diffusion‚ filtration‚ and osmosis. In our Osmosis Lab I used a Grade a large egg from the grocery store. Its circumference is 5 ½ inches it is smooth with no cracks. I carefully place the egg in a clear plastic cup and fill the cup with vinegar
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Examining Diffusion and Osmosis Introduction: Purpose: 1. To simulate and observe the diffusion of solutes and the osmosis of water through a semipermeable membrane through color change and sugar tests. 2. To speculate osmosis occurring in dialysis bags and potato cores by comparing percentage change in masses. Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other
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1) Research Problem What is Molecular Gastronomy? Best described by Hervé This‚ as the understanding of food apart from the chemistry and physics behind the preparations of any dish for example‚ why a mayonnaise becomes firm or why a soufflé swells. So‚ how can chemistry and physics lead to a new ways of cooking? One example quoted by Herve is the egg. If we heat an egg‚ water evaporates‚ the proteins denature and polymerize to enclose water‚ and the end result is a cooked egg. Alternatively
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In this essay‚ it will be discussed how the Kinetic Molecular Theory explains many gas law specifically Boyle’s gas law‚ Charles’ gas law‚ and Avogadro’s gas law. To understand what will be talked about is to first know what the Kinetic Molecular Theory is. In our textbook is says it is “A simple model for gases that predicts the behavior of most gases under many conditions.” First off‚ we will take a look at Boyle’s Law. As stated in our lab manual “at constant temperature the pressure which a given
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over time by acculturation‚ diffusion‚ and innovation; It spreads by religions and language. Culture develops‚ spreads‚ and changes over time. Innovation‚ diffusion‚ and acculturation are the processes of how culture is changing. Innovation is taking existing technology and resources and creating something new to meet a need. For example‚ to solve the need for storage goods‚ some societies invented baskets woven from reeds because reeds were abundant. Diffusion is the spread of ideas‚ inventions
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PageOut® Quick-Assessment Preview http://hawwat.pageout.net/page.dyn/instructor/assessment/quick_assessme... Quick-Assessment Review BIO Instructions BIO Go to : http:// This assessment is worth 30 points. 1. The Shine-Dalgarno sequence is a (1 point) a. b. prokaryotic mRNA sequence that binds lF-3. prokaryotic mRNA sequence that binds the 16S rRNA of the small ribosomal subunit. prokaryotic mRNA sequence that binds the 16S rRNA of the large ribosomal subunit. eukaryotic rRNA sequence
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Composition and Molecular Formula Worksheet 1. What’s the empirical formula of a molecule containing 65.5% carbon‚ 5.5% hydrogen‚ and 29.0% oxygen? 2. If the molar mass of the compound in problem 1 is 110 grams/mole‚ what’s the molecular formula? 3. What’s the empirical formula of a molecule containing 18.7% lithium‚ 16.3% carbon‚ and 65.0% oxygen? 4. If the molar mass of the compound in problem 3 is 73.8 grams/mole‚ what’s the molecular formula? Write the molecular formulas of the
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Faculty of Medicine MAHSA UNIVERSITY STUDY GUIDE Block: Genetics‚ Immunology & Molecular Medicine (GIM) Session: 2013/2014 Semester 1 (Year 1) MBBS PROGRAM Block Coordinator: Dr Selvi Palasubramaniam CONTENTS 1. Teaching Staff & Contacts 2 2. Academic calendars MBBS Session 2013 / 2014 3 3
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