Cellular Respiration Objective: To observe and determine cellular respiration in yeast/onion cells. * Measure respiration rate using different substrates. * Measure respiration rate at different temperature. Introduction: In this laboratory experiment‚ we are given 3 task. The first one is respiration in yeast. Second is respiratory indicator and the third one is observing mitochondria in yeast/onion cell. The first experiment is about investigation of sugars yeast. We will determine
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OSMOTIC POTENTIAL OF CELL SAP OF PLANT EPIDERMAL CELLS Aim: The purpose of this experiment is to investigate the effects that the molarity of the sucrose solution and distilled water have on the plasmolisys of epidermal cells of a red onion. Hypothesis: Taking in consideration osmosis‚ and my knowledge about it‚ my prediction is that as the molarity of the solution under which the cells are exposed will increase‚ also the amount of plasmolysed cells‚ counted from amount of undamaged cells
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Carbohydrates: monosaccharides‚ disaccharides‚ and polysaccharides. Monosaccharides are the simple sugars. Two monosaccharides make a disaccharide. Three or more monosaccharides are a polysaccharide. Glucose‚ fructose‚ and galactose are monosaccharides. Sucrose‚ lactose‚ and maltose are disaccharides. Starch and glycogen are polysaccharides. Simple sugars can be found by using Benedict’s test. Starch will react with IKI to give a dark blue color change. Lipids are macromolecules that are usually insoluble
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are reducing sugars. Variables: a. Independent: Function groups react w/ reagent b. Dependent: Color change (red‚ orange‚ yellow) Control: Water Materials: - 4 mL of each solution (Water‚ Starch‚ Glucose‚ Maltose‚ Sucrose‚ Onion Juice‚ Potato slice‚ Milk) - 8 test tubes - 8 pipetes - Benedicts regagent - 150 mL of water - Beaker - 1 pair of tongs - Test tube rack - Hot plate - Dropper - Timer Procedure:
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test‚ Sudan IV test‚ Biuret’s Test and the Grease-Spot test‚ also explain the importance of a positive and negative control. ! ! ! ! ALL MATERIALS! 1. Test tubes! 2. Benedict’s solution! 3. Iodine! 4. Water-bath ! 5. Onion juice! 6. Potato juice! 7. Sucrose juice! 8. Glucose juice! 9. Distilled water! 10. Reducing-sugar solution! 11. Starch solution! 12. Sodium hydroxide (NaOH)! 13. Egg albumen! 14. Honey! 15. Amino acid solution! 16. Protein solution! 17. Water! 18. Acetone
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better understand the movement of water through cells. This will be done by putting cores of apple tissue in sucrose solutions of different concentrations and measuring the changes in mass of the apple cores. The changes in mass reflect the movement of water into or out of the tissue. After determining the concentration of sucrose solution at which there is no net gain or loss of water from the apple tissue‚ the osmotic potential can be calculated. This will then tell the water potential of the apple
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introduced with the Iodine solution? Hypothesis: * If a solution is rich in starch then it will react with iodine solution and change to a bluish-black color (looks Brown) Materials: Items: * 8 test tubes‚ pipet‚ iodine‚ onion juice‚ potato juice‚ sucrose solution‚ glucose solution‚ distilled water‚ fructose solution‚ starch solution‚ & beats juice Safety Concerns: * If the iodine touches skin it might burn * Everything smells bad chance of vomiting Procedure: 1. Get
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individual work and is my sole intellectual property. It does not contain the ideas or writing of other individuals/authors. _Alexandra DeWitt_____________ __5/1/13____________ Author Date _10_________ Lab Section # Increasing Sucrose Concentrations Causes the Osmotic Concentrations of Disks of Potato Tubers to Decrease Abstract: Introduction: The biological membranes are composed of phospholipid bilayers‚ each phospholipid with hydrophilic heads and hydrophobic tails‚ and proteins
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Suggested answers to Practical Workbook for SBA Ch 1 Introducing biology Practical 1.1 Design an investigation of the effect of fresh pineapple on the setting of jelly Propose a hypothesis (p. 1-2) It is the fresh pineapple that causes the jelly to remain in liquid form. Design and perform an experiment (p. 1-2) 1 (Answer varies with Ss. The recommended quantity of jelly powder and water is stated on the packet of the jelly powder. Jelly will not set if it is too dilute.)
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tubing and then tied of the other end securely leaving room for expansion. Then blotted the tube dry and placed it in the cup labeled “water”. Then we repeated the same process witht eh remaining five pieces of dialysis tubing‚ adding a different sucrose solution to each bag: 0.2 M‚ 0.4 M‚ 0.6 M‚ 0.8 M‚ and 1.0 M. After‚ we then weighed each bag and recored each bag’s initial mass in Table 2. Then filled the six plastic cups approximately ¾ full of distilled water and immersed one bag in each of
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