assigned sugar substrate namely: starch‚ lactose‚ sucrose glucose and fructose respectively. Set-up six was the controlled set-up and did not contain any sugar substrate. The opening of the tube was covered with a cotton ball to prevent oxygen from entering. The set-ups were then observed every five minutes for thirty minutes. The volume and rate of carbon dioxide (CO2) evolved was calculated and recorded. Results showed that set-up 2 which contained the sucrose substrate yielded the highest rate of cellular
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in both short and long distances while osmosis takes place over short distances. Molecules are in a state of equilibrium across a selectively permeable membrane during osmosis. Water is the smallest with 3 atoms‚ then glucose with 24 atoms‚ than sucrose with about 48 atoms‚ and then finally starch. Materials: Refer to lab book Procedure:ia Refer to lab book Data: Refer to lab book Analysis: The purpose of the dialysis bag containing only water in a cup of water
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The aim of this experiment is to investigate how potato tissue changes when placed in sucrose solution of different concentrations. Therefore‚ I want to find out if and how osmosis differs‚ when the concentration is changed. Variables What is the variable you are going to change in the experiment? The input variable of this experiment (i.e. the variable to change) will be the concentration of sucrose solution present in the test tubes‚ which the potato samples will be placed into. What
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Fermentation Lab: Conclusion & Evaluation of the Effect of Type of Carbohydrate on Amount of CO2 Produced IB Biology/Topic: 3.7 05 February 2013 Question: Which type of carbohydrate‚ glucose‚ sucrose‚ or starch‚ will produce the greatest amount of fermentation over the class period? Why? Hypothesis: If the carbohydrate starch is added to the set up of yeast‚ then it will create the greatest amount of fermentation because starch is a polysaccharides
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starch. For this lab the following materials were needed to complete the experiments in test 1 for proteins: Di water‚ ev milk‚ 50% egg solution‚ 1% sucrose‚ 4 test tubes‚ 1 test tube rate‚ safety glasses‚ pipets and the reagent solution. For test 2 for starches the following materials were used: Di water‚ 1% starch solution‚ onion juice‚ sucrose solution‚ iodine reagent‚ 4 test tubes‚ test tube rack and pipets. In test 1 and test 2 each solution was placed in a separate test tube with the corresponding
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Observation: Part B Sample | Sucrose | Sodium Acetate | Naphthalene | Mass of solid (g) | 5g | 2g | 2g | Volume of water (50mL) | 50mL | 50mL | 50mL | Volume of water & solid (mL) | 53mL | 52mL |
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Osmosis is a specialised form of diffusion. Water moves from an area of LOW concentration of Solute to an area of HIGH concentration of solute through a semi-or fully permeable membrane by the process. Water moves constantly through the cell ’s membrane its estimated that about 250 times the volume of a single cell moves through 1 per second This continues until the solute concentration reaches equilibrium It is convenient to express the available energy per unit volume in terms of "osmotic
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Six substrates were used. They were the following with the volume of carbon dioxide they produced in cm3. Sucrose –34.35‚ fructose –33.84‚ glucose –31.81‚ starch –1.57‚ and both lactose and distilled water got zero. Some substrates have simple compositions and are easy to break down unlike while some have complex compositions and are hard to break down during
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Lab Report Electrical Conductivity Introduction There are some substances that are capable of conducting electricity‚ and the reason they conduct electricity is because of the type of compound the substance is. Electrolytes or any ionic compound conduct electricity and nonelectrolytes do not conduct electricity. An Ionic compound is formed from the electrical attraction between anions and cations‚ typically a metal with a non-metal‚ except hydrogen. When an ionic compound forms‚ the anion
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evolved than MgSO₄. In the second set-up‚ six Smith fermentation tubes were used each containing different 15mL solution (starch‚ lactose‚ sucrose‚ glucose‚ fructose or distilled H₂O). the tubes were then added with 15 mL distilled H2O and 15 mL 10% yeast suspension. Here‚ results show that fructose had the highest rate of respiration followed by glucose‚ sucrose‚ lactose‚ starch and H₂O. Thus‚ simpler substrate would mean higher rate of respiration. INTRODUCTION We all need life to survive. Life
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