Name _______________________________________________Period_________Date_______________
Cell Membrane Webquest
www.crestwood.sparcc.org/.../07%20Cell%20membrane%20Webque
Part 1 “ Cell Membrane" http://www.wisc-online.com/objects/index_tj.asp?objID=AP1101
Step through the animation once to get an overview of a cell membrane.
Draw a cell membrane and label all the parts as you step through the animation a second time
Part 2 - “ Components of a Cell Membrane" http://www.biologymad.com/cells/cellmembrane.htm
1. Name the three organic compounds that make up the cell membrane.
______________________ ______________________ _____________________
Lipids
2. How are phospholipids arranged?
3. The _______ layer acts as a barrier to __________molecules.
4. Animal cell membranes contain _______________linking the fatty acids together and so stabilizing and
strengthening the membrane.
1. Proteins
______________ proteins usually span from one side of the phospholipid bilayer to the other (integral
proteins)
2. ______________ proteins sit on one the surfaces of the cell membrane.
3. Proteins comprise about ______ of the mass of membranes, and are responsible for most of the
membrane's properties.
4. _______________ proteins that span the membrane are usually involved in transporting substances
across the membrane.
5. ________________proteins are often attached to the cytoskeleton and are involved in maintaining the
cell's shape, or in cell motility. They may also be enzymes, catalysing reactions in the cytoplasm.
Carbohydrates
1. Where are carbohydrates found in eukaryotic cell membranes?
2.
3.
4.
5.
6.
Proteins with carbohydrates attached are called __________________.
Phospholipids with carbohydrates attached are called glycolipids.
Carbohydrates are short polysaccharides composed of different ____________________ .
and form a ________________ outside the cell membrane.
What are the functions of the glycocalyx?