energy‚ the molecules go down a concentration gradient. Active transport is the opposite it uses ATPase for energy‚ and molecules move against a concentration gradient. Prediction: When the potato cylinder is placed in a high water potential sucrose solution I think it will increase in mass‚ and length. This is because the solution has a higher water potential than the cells in the cylinder‚ water molecules will travel from a high water potential (The solution) to a low water potential (The potato
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Compare and contrast xylem tissue and phloem tissue‚ including their respective structures and functions. The stems and roots of plants contain two separate transport systems; xylem vessels and phloem tubes‚ of which neither transport oxygen as it is transported to cells by diffusion. The network of xylem vessels transports water and mineral ions from the roots to all other parts of the plant whereas phloem tubes transport food made in the leaves to all other parts of the plant. In the stems
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Sugar History Details elaborated by the Greek historian Herodotus “the father of history” narrate that great king of Persia Darius commissioned a navel party to explore the River Indus to its mouth. Led by lonian Greek named Skylax the expedition proceeded east and hit the Kabul River and then headed south to Arabian sea‚ the outfall of River Indus. The mission was followed soon and in 510 BC the Emperor Darius of what was then Persia invaded India where he found "the reed which gives “honey without
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CAL Biology Practical 2 – Identification of Biochemicals in Pure Form Name :……………………………………………………………. MARK: Class :……………………………………………………………. PRACTICAL 2: IDENTIFICATION OF BIOCHEMICALS IN PURE FORM CAUTION: Any heating that has to be done in the following tests should be carried out in a water bath at the boiling point of water. Direct heating of test-tubes should not take place. Introduction Biochemical Tests Qualitative - present/ absent Semi-quantitative - present in >/<
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Introduction: This experiment was used to examine the hypothesis that: Osmosis is dependent on the concentrations of the substances involved. Diffusion is the passage of solute molecules from an area of high concentration to an area of low concentration (Campbell & Reece‚ 2005). An example is ammonia diffusing throughout a room. A solute is one of two components in a chemical solution. The solute is the substance dissolved in the solution. The solvent‚ the other component‚ is any liquid in
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FOUNDATION OF MEDICAL SCIENCE BIOLOGY-FGS0044 LAB REPORT 3.1 : CARBOHYDRATE DETECTION TEST LAB REPORT 3.2 : PROTEIN DETECTION TEST LAB REPORT 3.3 : LIPID DETECTION TEST GROUP MEMBERS : CONTENTS NO. | TITLE | PAGE | 1 | INTRODUCTION | 3 | 2 | LAB 3.1 : CARBOHYDRATES DETECTION TEST | 5 | 3 | LAB 3.2 : PROTEINS DETECTION TEST | 8 | 4 | LAB 3.3 : LIPIDS DETECTION TEST | 12 | 5 | REFERENCES | 14 | INTRODUCTION Carbohydrates (saccharides) are molecules consist of carbon
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identify the component of the solution in its pure form with various food tests and state the justifications. Apparatus : Test-tube ‚ test-tube holder ‚ water bath 95’c ‚ measuring cylinder ‚ white tile ‚ test-tube rack . Materials : Glucose‚ sucrose ‚ fructose ‚ hydrochloric acid ‚ potassium hydroxide ‚ albumin ‚ cooked starch ‚ corn oil ‚ copper (ll) sulphate solution ‚ ascorbic acid solution ‚ DCPIP solution ‚ Millon’s reagent ‚ Sudan lll ‚ tap water‚ ethanol ‚ iodine solution ‚ Benedict’s
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not accomplished on a molecular scale nor is it due to the differences among the various molecules. Separation will be accomplished using mechanical-physical forces and not molecular or chemical forces and diffusion. Examples : Filtration In filtration a pressure difference
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area of high concentration to low concentration (Biological 21). With this knowledge we tried to recreate diffusion for students to understand the process. The dialysis bags represented our selectively permeable membrane with the fluid inside it‚ sucrose. How much of the substance moves from the cup to the bag quickly depends on the temperature of the substance. The class used four different temperatures to measure the rate of diffusion. I thought that the rate of diffusion would increase as temperature
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List the molecular weight‚ melting point‚ boiling point‚ density‚ solubility‚ and hazards of all pertinent chemicals used in the experiment. Data/Observations: Your observations of the experiment‚ a. Weight of initial panacetin sample. b. Weight of sucrose collected. c. Weight of aspirin collected. d. Weight of unknown compound isolated e. Weight of recrystallized unknown compound f. Melting point range of recrystallized unknown compound. g. TLC sketches with appropriate data for Rf calculations (Clearly
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