Exploration How do increasing sucrose concentrations of 0.0 mol dm3‚ 0.2 mol dm3‚ 0.4 mol dm3‚ 0.6 mol dm3 and 0.8 mol dm3 affect the osmolarity point of potato cells‚ where it is investigated how osmosis changes the weight of the potato cells‚ measured by the percentage change between the initial and final mass of the potato? Independent Variable: Increasing sucrose concentrations Dependant Variable: Mean percentage change in mass of potato cells All cells have a protective barrier‚ one which
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concentration gradient. This is done to equalise the solute concentrations on the two sides. Therefore‚ in other words‚ the movement of water is depended on the concentration of dissolved solute in the water (in this case the sucrose) and if there are a higher concentration of sucrose in the visking tubing‚ the water in the beaker will move into the visking tubing to make both solution balanced (isotonic). In order for osmosis to occur naturally‚ a semi-permeable membrane is required as a medium. A visking
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Respiration is the process by which energy is released energy from glucose in the presence of Oxygen‚ forming carbon dioxide and water as waste products. Glucose releases energy in a series of reactions that take place inside components of the cell. The stages are briefly explained below as were briefly explained in part A‚ the process then goes through‚ glycolosis‚ link reaction and then the Krebs cycle. The volume of CO2 that is produced in the Krebs cycle is important as this is the dependant
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translocation Girdling experiments involving the removal of a ring of cortex including phloem cells below leaves prevent the flow of food materials towards roots which accumulate at the upper rim o the rig and shows swelling. Radioactive tracers like 14CO2 sucrose phosphates supplied to lead are found to be translocated through sieve tube elements. While mealy bugs pierce their stylets into sieve tubes and suck the sap‚ the white bugs have specialized in feeding on the sieve tube sap. Thus various studies
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BISHT Contents 1. Introduction 2. Aim 3. Theory 4. Apparatus 5. Chemicals Required 6. Detection of pH 7. Test for Carbon dioxide 8. Test for Glucose 9. Test for Phosphate 10. Test for Alcohol 11. Test for Sucrose result 12. Precautions 13. Conclusion 14. Bibliography Introduction The era of cold drinks began in 1952 but the industrialization in India marked its beginning with launching of Limca and Goldspot by parley group of companies. Since
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painful procedure when compared with the other two (Leef‚ 2006; Yawman et al.‚ 2006). Preferred by trainees‚ the Morgen clamp is also faster to use than the Plastibell (Yawman et al.‚ 2006) and include local and topical pain relief methods‚ oral sucrose and oral acetaminophen. Dorsal penile nerve block (DPNB)‚ which involves injecting anesthetic at the base of the penis‚ and subcutaneous ring block are the two most commonly used local anesthetics. Topically applied anesthetic creams include EMLA
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organic compound like sucrose‚ Ba (OH) 2 for fermentation process‚ and use simple distillation method to purification from the fermentation mixture. Abstract and Theory: There are many techniques that are used to purify liquid. The one that is going to use for this lab is simple distillation. It is a process of which separating a mixture based on the tendency of the mixture to vaporize into a boiling liquid. For this particular experiment‚ a disaccharide carbohydrate sugar like sucrose will mix with yeast
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acetanilide behind. Experimental: For the separation of sucrose‚ we weighed out 3.048g of Panacetin onto a filter‚ and 50 mL of dichloromethane in a graduated cylinder. Then we transferred both the panacetin and dichloromethane into an Erlenmeyer flask and stirred it until the panacetin was dissolved. We let it dry by gravity and set it aside to dry. The filter paper weighed about 1.320g and sucrose weighed out at 1.028g. Sucrose also ended up on the outside rim of the filter paper. We then
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The next two questions refer to the diagrams below representing an organelle from a cell. Question3: The organelle in the diagram is: a) The nucleus of a cell b) A Mitochondria c) Part of the cell membrane d) A golgi body Question 4: The function of this organelle is to: a) Control the metabolism of the cell b) Modify proteins by adding a glycoprotein c) Synthesis proteins d) Package molecules into vesicles before secreting them from
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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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