4. Describe the appendages of bacterial cells.
a. How motility is accomplished in
bacterial cells.
b. What are pilin and the role of pili and
fimbriae.
c. Explain the structure of flagella.
1) Describe the five basic mechanisms of antibiotic action
against bacterial cells. Give examples of drugs that are used in
each category.
2) In many instances, resistance builds to antibiotics over
time. Describe at least seven ways this resistance develops
3. Which would be more accurate in terms of determining
numbers of viable bacterial cells in a population: an estimation of
turbidity in broth, or a standard plate count? Why? Discuss sources
of inaccuracy in both approaches.
Construct a table that illustrates the structure and function of
the glycocalyx, ECM, 3 types of cytoskeletal elements, and the 3
types of cell-cell junctions. In the table include the specific
macromolecules that make up these structures, specific properties
these structures give to the cell or tissue. Give one example of a
tissue or cell whose properties depend on each of these
structures.
Bacterial cells couple the process of transcription and
translation. In eukaryotic cells, the process of transcription and
translation are uncoupled or occur separately. Provide explanations
as to why bacterial cells can couple the process of transcription
and translation while in eukaryotic cells, the process is
separated.
1. What is the importance of generating isolated bacterial
colonies?
2. Describe how a bacterial sample would be obtained from and
inoculated into each of the following types of media.
Agar slant:
Agar plate:
Broth:
4. What is a subculture?
6. How would a subculture appear if a colony
containing both S. marcescens and M. luteus was
subcultured to
a slant?
7. Condensation often gathers in the bottom of
agar slants. Why is it important in this exercise to limit...
1.
What are the 3 types of glycocalyx?
2. Describe what is part of each or what each is made of.
3. What do each of these provide for the organisms that
produce them?
Thank you so much!