[Type text] [Type text] [Type text] _An experiment on the effect of surface area to volume ratio on the rate of osmosis of Solanum tuberosum L._ BACKGROUND A cell needs to perform diffusion in order to survive. Substances‚ including water‚ ions‚ and molecules that are required for cellular activities‚ can enter and leave cells by a passive process such as diffusion. Diffusion is random movement of molecules in a net direction from a region of higher concentration to a region of lower concentration
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cell had to draw in extra salt following the substantial weight loss from the 3% salt solution. Thus‚ the cell immersed in the 5% salt solution gained weight following the 3% salt solution. This could be examined further in another study regarding osmosis and weight gain in plant cells. In Figure 2‚ it highlights that the average weight (g) from the individual data had a higher ‘before weight (g)’‚ compared to the class data‚ which had a lower ‘before weight (g)’. It is assumed that this is due to
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Benedict’s reaction. [1]Reducing sugars include glucose‚ fructose‚ glyceraldehyde‚ lactose‚ arabinose and maltose. All monosaccharides which contain ketone groups are known as ketoses‚ and those which contain aldehyde groups known as aldoses. Benedict’s reagent is used to determine if a reducing sugar is present. Benedict’s reagent is used as a test for the presence of all monossacharides and generally also reducing sugars. These include glucose‚ galactose‚ mannose‚ lactose and maltose. Even more
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"Do different concentrations of solutions determine the mass of a potato?" Introduction: The way to get the full results of this lab was through the process of osmosis. Osmosis is the movement of water across a membrane into a more concentrated solution to reach an equilibrium. When regarding cells osmosis has three different terms that are used to describe their concentration. The first of these words is isotonic. Cells in an isotonic solution show that the water has no net movement and the amount
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the molecule ’s movement is random‚ equilibrium is being sought out. Osmosis is a type of diffusion only It involves water. In osmosis water diffuses from the area of high concentration to an area of low concentration‚ to diffuse the more molecule rich side. Because cells have selectively permeable membranes‚ meaning certain substances can flow through the membrane‚ this allows osmosis to happen to cells in certain solutions. Osmosis can affect the cell in three different types of ways. The cell can
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Determining the Production of Glucose During Changes in Temperature and pH‚ and Manipulation of Specificity and Cofactors BIOL-1406-SL8 November 16‚ 2012 Abstract Enzymes are biological catalysts. They work by lowering the activation energy needed to initiate a chemical reaction. Enzymes work within an optimal temperature and optimal pH. Enzymes are highly specific for a single substrate. The Enzyme is usually much larger in size than the substrate it binds to. In some cases‚ an enzyme requires
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FDA CONTINUES WARNING ON COUNTERFEIT TOUCH BLOOD GLUCOSE TEST STRIPS Back in 2005‚ Food and Drug Administration (FDA) has alerted the public to counterfeit blood glucose test strips being sold in the United States claiming different models and under different brands. Upon tracing the origin of these counterfeited medicines‚ the authorities had found same copies distributed in developing countries including Jakarta‚ Indonesia‚ Bangkok‚ Thailand and some part of Northern Australia. Ten years later
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BANGALORE-560090 Contents: 1. Introduction 2. Nutritions 3. Health benefits of honey 4. Materials and method 5. Brief protocol 6. Outcome/observation 7. References INTRODUCTION: Honey is a sweet food made by bees using nectar from flowers. Honey bees transform nectar (saccharide) into honey by a process of regurgitation and evaporation. (Regurgitation is the process of bringing back the food into the mouth after it has been swallowed‚ usually characterized by the
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Diffusion continues until it reaches equilibrium. Osmosis is similar to Diffusion but it’s the process in which water moves across a semi-permeable membrane and goes to the higher concentration of solute.1 2.2. Important factors to Osmosis and Diffusion include Temperature‚ Concentration and Surface area to volume ratio. Temperature can affect the rate in which a solute dissolves in a solution‚ higher temperature faster rate of Osmosis. This is caused by the molecules movements being faster
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Using Microsoft Excel 2010 Advanced Skills Using Microsoft Excel Advanced Skills Excel contains numerous tools that are intended to meet a wide range of requirements. Some of the more specialised tools are useful to only certain types of people while others have value for more general excel users. These exercises will cover some of the advanced features that may be useful for most excel users. These features will include cell naming‚ cell notes‚ conditional formatting‚ data validation
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