INTERNET LAB-CELL STRUCTURE
OBJECTIVES
1. Understand how Prokaryotic and Eukaryotic cells differ and be able to give examples of
each
2. Learn about structure, function and organization of various sub-cellular organelles of
Eukaryotic cells
3. Introduce Cell Membrane structures
INTRODUCTION
The basic unit of life is the cell. Thus, all living things are composed of cells. There are two
basic cell forms; Prokaryotic and Eukaryotic. Prokaryotic cells are considerably simpler and
are exemplified by bacteria. Other life forms are assembles from one or more eukaryotic cells.
Eukaryotic cells are thought to have arisen from symbiotic associations between prokaryotic cells
and are both considerably more complex and larger than prokaryotic cells. Eukaryotic cells
involve a number of different sub-cellular organelles which are (except for ribosomes) membrane
bound structures in which specialized cell functions are carried out.
In this lab you should complete the questions below. You may use your text to answer many of
the questions, however, the websites will add to your knowledge and are worth studying in order
to complete this lab.
MATERIAL
Computer
Paper
QUESTIONS
Use a separate piece of paper to answer the questions
1. Sketch typical plant, animal and bacterial cells. Label the organelles on the cells. Go to
www.cellsalive.com for interactive cell models and information on organelles. On this
site, please click Contents and under Cell Biology select Cell Model to review Plant,
Animal and Bacteria cells and their organelles.
2. Sketch a typical cross section of a cell membrane showing arrangements of phospholipids
molecules, cholesterol, and membrane proteins and glycoprotein’s which may be
involved in transport of substances through the membrane and interaction with
substances in external environment of cell. Go to
http://kentsimmons.uwinnipeg.ca/cm1504/plasmamembrane.htm to answer the questions.
Also use http://cellbio.utmb.edu/cellbio/membrane.htm . In the table select
‘phospholipids’ and read and understand the figures.
3. Where are cell membranes found in eukaryotic cells? Go to
http://www.usd.edu/~bgoodman/Membrane.htm to answer the question. Also click on
Osmosis and Diffusion.
4. What do we mean by ‘fluid mosaic’? What is fluid about a cell membrane and in what
way is it a mosaic? Google Tutorial on cell membrane and choose Membrane Structure
tutorial-Biology or use http://www.bio.davidson.edu/people/macampbell/111/membswf/membranes.swf . Use the arrow to cruise the website.
What organelles in the cell are parts of the endomembrane system and how do the different
components of the endomembrane system interact? Use
http://bcs.whfreeman.com/thelifewire/content/chp04/0402002.html