7. Prokaryotic Cell Structures & Functions

Which prokaryotic cell surface structure is correctly matched with its function?

Match the structures with their descriptions following. A letter may be used more than once or not at all, and more than one letter may be correct for each blank.

  ____ Glycocalyx

  ____ Flagella

  ____ Axial filaments

 ____ Cilia

  ____ Fimbriae

  ____ Pili

  ____ Hami

A. Bristlelike projections found in quantities of 100 or more

B. Long whip

C. Responsible for conjugation

D. “Sweet cup” composed of polysaccharides and/or polypeptides

E. Numerous “grappling-hook” projections

F. Responsible for motility of spirochetes

G. Extensions not used for cell motility

H. Made of tubulin in eukaryotes

I. Made of flagellin in bacteria

Differentiate among pili, fimbriae, and cilia, using sketches and descriptive labels.

The thick-walled reproductive spores produced in the middle of cyanobacterial filaments are called                  .

a. Akinetes

b. Terminal endospores

c. Metachromatic granules

d. Heterocysts