Act. 2 Biomolecules and Molecular Transport

Act. 2 Biomolecules and Molecular Transport - UNIVERSITY OF...

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UNIVERSITY OF ASIA AND THE PACIFIC Department of Science SC101 (Biology) Laboratory Activity 2 Biomolecules and Molecular Transport The cell, which is the fundamental unit of life, is made up of atoms and molecules which, in turn, comprise the biomolecules (carbohydrates, proteins, lipids, and nucleic acids). These biomolecules account for the structural and functional differences of the cellular components. The activities that take place inside the cell depend on the materials that move in and out of the cell. Certain important nutrients have to be retained within the cell and should not leak out whereas others have to be transported in and out of the cell. Similarly, wastes have to be discharged. Molecular transport facilitates the exchange of materials like food and water between the cells and the environment. Objectives: At the end of this laboratory activity, the students must be able to …. . 1. identify and distinguish the different biomolecules based on their reactions to colorimetric tests carried out, and 2. differentiate the processes of diffusion and osmosis. Materials : unknown substances in different beakers, 13 x 100 mm test tubes, Biuret reagent, iodine – potassium iodide (IKI) solution, Benedict’s reagent, detergent, beakers of water, gulaman plates, 1 M methylene blue solution, methylene blue powder (or food coloring powder), 1 M potassium permanganate (KMnO 4 ), mm ruler, marker, boiling water bath, hot plate, Pasteur pipets, rubber bulbs, 250 – ml beakers, stirring rods, spatula. Procedures:
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Act. 2 Biomolecules and Molecular Transport - UNIVERSITY OF...

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