• Test Tube Solution Starch Water
    1,541 words
    Detection of Biological Molecules Introduction: Without carbon, nitrogen, hydrogen, sulfur, oxygen and phosphorus, life wouldn't exist. These are the most abundant elements in living organisms. These elements are held together by covalent bonds, ionic bonds, hydrogen bonds, and disulfide bonds. Covalent bonds are especially strong, thus, are present in monomers, the building blocks of life. These monomers combine to make polymers, which is a long chain of monomers strung together. Biological mol...
  • Beet Lab Test Tube
    832 words
    MATERIAL AND METHODS Stability of cell membrane using pHF or the lab experiment for testing the stability of beet cell membranes using pH, many materials were used as follows. Obtaining a beet we punch out cores, using a cork borer. After washing the cores we put each one inside a separate test tube, and added a different pH solution in each one. After 3 minutes in these exposure solutions, we took the beet out with a dissecting needle. Then transferred each beet to a separate test tube contain...
  • Fermentation Test Tube
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    Planning PROBLEM TO BE INVESTIGATED Yeast enzyme specificity: Specificity of Brewers and Bakers yeast enzymes to different sugars (being monosaccharides) HYPOTHESIS I predict Bakers yeast to have a different enzyme specificity compared to Brewers yeast where more CO 2 is produced at 37 0 C. BACKGROUND KNOWLEDGE Fermentation is the breakdown of sugars by bacteria and yeast using a method of respiration without oxygen (anaerobic respiration). It involves a culture of yeast and a solution of sugar,...
  • Test Tube Experimental Water Tubes
    5,658 words
    Materials and Methods The first experiment involved examining the effect of temperature on aerobic respiration of germinated pea seeds. The students testing the effect of temperature, will be divided into two groups. The first group is Student Pair A. They will test the effect of 10 C, 20 C and 30 C temperatures on pea respiration rate. The second group is Student Pair B. They will test the effect of 40 C and 70 C temperatures on pea respiration rate. For both groups, the first procedure calls ...
  • Ionic Bond Solutions Of Lead Nitrate
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    When ionic solids dissolve, they divide to give their positive and negative ions that make up the solids. These ions become hydrates and have the same relative proportions when in solution and when solid. The more the solid dissolves, the more the ion's concentration increases. This increase and build-up allows for the reverse reaction to occur. In this phase of the reaction the ions crystal lise out in order for the reaction to have a greater chance of occurring. Eventually the rate of dissolvi...
  • The Relationship Between Food Concentration And Respiratory Activity
    416 words
    The Relationship Between Food Concentration, and Respiratory Activity In this experiment different concentrations of sucrose were tested to determine which leads to the most respiratory activity in yeast. Yeast is a heterotrophic anaerobic fungus which lacks chlorophyll. Yeast is used commercially to ferment the sugars of wheat, barley, and corn to produce alcohol, and in the baking industry to raise or expand dough. Yeast or alcoholic fermentation is the anaerobic process of respiration by whic...
  • Test Tube Physical Chemical Record
    997 words
    Abstract: This lab assignment is to observe certain substances and observe its physical and chemical changes in different environmental conditions. We first observed its physical properties, such as physical state and color and recorded it on paper. Then we did different types of experiments on some of the substances and observed the chemical changes. Some of the chemical changes where endothermic, exothermic, changes in color and changing of its physical state. We recorded the observations. In...
  • Test Tube Tubes Solution Drops
    923 words
    Problem: How are carbohydrates identified as a monosaccharide? Hypothesis: I predict that when we add the Benedict's solution to the different types of saccharides and then boil it we will most be able to determine all the information the we need to accumulate to record data resulting in the conclusion for the Benedict's solution. I always plan to see the addition of the Iodine work wonders in its own way. Both ways will help us determine factors with the unknown and known carbohydrates. I also ...
  • Time Temp Colour Results Test
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    Does the Colour of a Liquid Effect How Fast it Cools? I am trying to find out if the colour of a liquid effects how quickly it cools down. Method: 1. First I took five test tubes and filled each one with 5 ml of black, blue, green, red and 'clear' colouring (for the 'clear' colouring I simply used water. ) 2. I then filled each of the test tubes with 25 ml of boiling (of course whilst wearing safety goggles. ) water and waited for the temperature to fall to 50^0 C and then measured the temperat...
  • Bromthyol Blue Litmus Solution Red
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    What is the pH of the substance Controlled Comparison: During class, our instructor set up the same lab that we were doing with 2 solutions, both of which were known acidic or basic. He placed 2 ml of the known acid into 2 different test tubes, and 2 ml of the known acid into 2 different petri dishes. Then using forceps, he tested blue litmus paper in one petri dish, and red litmus paper in another. The blue litmus paper, after being dipped into the solution, turned red in reaction to the acidic...
  • Salivary Amylase Lab Ap Bio
    1,023 words
    Salivary Amylase Lab In this laboratory, I observed the process by which salivary amylase, an enzyme secreted by the salivary glands in the mouth, breaks starch down into maltose. This requires a relatively straightforward experiment with only a couple of indicators, some test tubes, and a starch source. To understand the process, one has to understand chemical reactions with enzymes and the its major role in the digestive system of the human (Chapter 37). Just to refresh the reader, I will defi...
  • Test Tube Acetone Solution Water
    1,369 words
    Abstract This is an experiment on how chemical stress effects cell membranes, specifically the tonoplast of Beta vulgaris taproot cells. This experiment involved the treatment of the aforesaid cells with different concentrations of an acetone solution, and testing the resulting solution for absorbance of light by betacyanine, using a spectrophotometer. It had been hypothesized that the higher the concentration of acetone in the solution, the higher the concentration of betacyanine in the resulti...
  • Test Tube Starch Solution Water
    1,542 words
    Detection of Biological Molecules Introduction: Without carbon, nitrogen, hydrogen, sulfur, oxygen and phosphorus, life wouldn't exist. These are the most abundant elements in living organisms. These elements are held together by covalent bonds, ionic bonds, hydrogen bonds, and disulfide bonds. Covalent bonds are especially strong, thus, are present in monomers, the building blocks of life. These monomers combine to make polymers, which is a long chain of monomers strung together. Biological mol...
  • Test Tube Solution Fescn Scn
    422 words
    Work to be done: By experiments find out how chemical equilibria works. Chemicals and apparatus: Two beakers Five test-tubes Kaliumtiocyanat, KSCN 0. 002 M Kaliumtiocyanatsolution, KSCN + H 2 O Dinatriumfosfat, Na 2 HPO 4 0. 002 M Iron (III) nitratesolution, FeNO 3 0. 2 M Silvernitratesolution, AgNO 3 Lab: Lab 1 One test-tubes is filled half of distilled water (A) and another with kaliumtiocyanatsolution (B). Both solutions are colorless. Solution (B) contains SCN-. I add five drops of iron (II...
  • Enzymatic Reaction Bubble Column
    1,616 words
    Situations That Govern the Pace of an Enzymatic Reaction: Enzyme Concentration, Temperature, and pH Joe Saunders BSC 1010 C; T, R: 11: 50-12: 05 Lab: T: 12: 15-3: 05 INTRODUCTION: An enzyme is any one of many specialized organic substances, composed of polymers of amino acids that act as catalysts to regulate the speed of the many chemical reactions involved in the metabolism of living organisms. The word enzyme comes from the Greek phrase en yeast. Many scientists who studied enzymes in the 180...
  • Estimation Of The Optimum Ph For Invertase
    1,156 words
    Introduction Invertase is a yeast-derived enzyme that is mainly used in the food (confections) industry where it helps prevent sugar crystallization in confections by hydrolysis of sucrose to yield glucose and fructose (web). Sucrose + H 2 O -- -> glucose + fructose An enzyme is a catalytic protein that changes the rate of a reaction without itself being consumed by the reaction. Due to its protein ous nature, invertase is sensitive to its environment. In particular, changes in temperature and p...
  • Hsc Biology Assessment Task 1 Enzyme Activity
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    Introduction: Enzymes are biological catalysts that regulate and accelerate the rate of biochemical reactions within a cell, but are not used up or changed in those reactions, therefore are accessible for reuse. They allow reactions to occur at a lower temperature than would otherwise be necessary in their absence. However, almost every significant life process is dependent on enzyme activity and without them life would cease. Enzyme activity occurs on chemical substances known as a substrate. E...
  • Investigating Hard And Soft Water
    699 words
    INTRODUCTION: Water that contains calcium and magnesium ions is called "hard water" because calcium and magnesium ions can combine with other ions and compounds to leave a hard scale on the surfaces they touch. Hard water may be a troublesome in household water supplies. Fortunately, there are simple solutions to hard water problems. Hard water can be softened by the removal of metallic ions responsible for the hardness. This is known as water softening. Softened water is desirable in the bathtu...
  • Osmosis In Potatoes Potato Chip
    1,094 words
    Aim: To find out the concentration of sugar in potato cells. Plan: Background science: Osmosis is diffusion of a special kind. It is diffusion of water across a semi-permeable membrane. Osmosis is very popular in plant cells. Osmosis works in plant cells because the cell membranes of the plant cells are partially permeable membranes. The cell sap inside of the vacuole is the strong solution. Therefore the water diffuses into the plant cell by osmosis and weakens the cell sap. Potato cells are a...
  • Reaction Rates Experiment Hydrochloric Acid
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    Experiment 34 Factors Affecting Reaction Rates Aim To observe the effects of temperature, catalysts, concentration, particle size and surface area on the rates of chemical reactions and to explain each of these effects in terms of kinetic-molecular theory. Equipment SS safety goggles SS 1 10 mL graduated cylinder SS 1 100 mL graduated cylinder SS 16 medium test tubes SS 1 test tube rack SS 2 250 mL beakers SS centigram scales SS 1 crucible tongs SS 1 thermometer SS 1 250 mL plastic bottle SS 1 r...