UNIVERSITY OF ASIA AND THE PACIFIC
Department of Science
SC101 (Biology) Laboratory
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).
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
Molecular transport facilitates the exchange of materials like food and water between
the cells and the environment.
At the end of this laboratory activity, the students must be able to ….
identify and distinguish the different biomolecules based on their reactions to colorimetric
tests carried out, and
differentiate the processes of diffusion and osmosis.
: 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
), mm ruler, marker, boiling water bath, hot plate, Pasteur
pipets, rubber bulbs, 250 – ml beakers, stirring rods, spatula.