Quantitative analysis – where the quantity of a particular biomolecule in a sample is determined‚ either as an amount (e.g. as g‚ or mol) or in terms of a concentration in the sample (e.g. as g/l‚ or mol/l). For example‚ a blood sample might be analyzed to determine its pH (-log10 [H+])‚ alcohol concentration in mg/mL‚ or glucose concentration in mmol/l. Your choice of approach will be determined by the purpose of the investigation and by the level of accuracy required. Major types of biomolecules
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kidneys and the osmolarity of urine. Measurements of urine volume‚ specific gravity and chloride concentrations were recorded in order to investigate this. Our hypothesis stated that the volume of urine would increase for all groups other than the group drinking 80 ml of water along with taking a 7g. This portion of the hypothesis was developed based on the relationship between salt concentrations in the blood and the release of antidiuretic hormone (Martini‚ Ober‚ Nath‚ Bartholomew‚ & Petti‚ 2018)
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Solution A homogeneous mixture of two or more substances with each substance retaining its own chemical identity. Solute – substance being dissolved. Solvent – liquid water. General Properties of a Solution 1. Contains 2 or more components. 2. Has variable composition. 3. Properties change as the ratio of solute to solvent is changed. 4. Dissolved solutes are present as individual particles. 5. Solutes remain uniformly distributed and will not settle out with time. 6. Solute
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Potato Tubers Andrew Dickson Background When a plant cell is bathed in a solution of the same concentration (isotonic) as its intracellular environment‚ its mass and volume remain the same. This is because water enters and leaves the cells at the same rate. There is no net loss or gain of water by osmosis. Samples of cells can be placed in a range of solutions of different concentration. The cells will gain water by osmosis when placed in solutions which are more dilute (hypotonic) than
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their higher concentration to their lower concentration‚ water will move across the membrane in response to this concentration. While conducting this lab we were able to observe passive transport through diffusion and osmosis. Introduction Osmosis is a specialized case of diffusion that involves the passive transport of water. When osmosis occurs water moves through a selectively permeable membrane from a region of its higher concentration to a region of its lower concentration. The membrane
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that the response of the tissue increased with bath concentration of ACh (M). The logarithms of bath concentration for each response were used to form a clear sigmoidal formation‚ and thus depict a more clear relationship between concentration and response. Figure 1 shows the increasing rate of response as bath concentration increased‚ before plateauing around the highest concentrations. Responses ranged from 0.685-100%‚ while bath concentrations of ACh ranged from 2 x 10-10 M to 8 x 10-6 M (see
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also processes that do not end so well in the concentrations being equal. In hypotonic solutions water flows into a low concentration area‚ in a hypertonic solution water is forced out
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Do Different Factors Affect Osmosis Aim: To discover The Different factors that affect osmosis. Factors that affects the rate of osmosis in a potato: * Time * Temperature * Molar * Sucrose solution * NaCl solution * Concentration of liquid * Age of the potato * Variety of the potato * Potassium‚ K(AQ) Factor Chosen: Different Molar of Sucrose Solution In this investigation I will change the molar of sucrose solution to find the increase or decrease in mass
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Lab Report Diffusion is - One of two kinds of passive transport‚ - Diffusion can transport ions from higher concentration to lower concentration region without any other forces. - A net movement of molecules in and out of cell membrane - Diffusion can be affected by the steepness of the concentration gradient. Lab question: Is the rate of diffusion influenced by the presence of second molecule? Prediction: the rate of diffusion is influenced by the presence of second molecule
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thiosulphate is affected by the concentration of the acid Simple Procedure Place a conical flask on a piece of paper with a cross on it. Add hydrochloric acid and sodium thiosulphate‚ and record the amount of time taken for the cross to disappear through the solution from the top of the flask. Record this time and repeat this for different concentrations of hydrochloric acid. Fair Test The variables in this test are: The concentration of hydrochloric acid The concentration of sodium thiosulphate
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