7. Prokaryotic Cell Structures & Functions

Use the following choices to answer questions 2–5:

a. Candida

b. Chlamydia

c. Gardnerella

d. Neisseria

e. Trichomonas

Microscopic examination of vaginal smear shows gram-negative cocci in phagocytes.

Use the following choices to answer questions 3–5:

a. Bacillus coagulans

b. Byssochlamys

c. flat sour spoilage

d. Lactobacillus

e. thermophilic anaerobic spoilage

A heat-resistant fungus that causes spoilage in acidic foods.

Match the following choices to the culture descriptions in questions 3 through 6:

a. Chlamydia

b. Coccidioides

c. Histoplasma

d. Mycobacterium

e. Mycoplasma

Your culture from a pneumonia patient appears not to have grown. You do see colonies, however, when the plate is viewed at 100x.

State the shape and arrangement of the pictured bacterial samples. <IMAGE>

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ A bacillus is a bacterium with a slightly curved rod shape.

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ A giant bacterium that is large enough to be seen without a microscope is Selenomonas.

The type of reproduction in prokaryotes that results in a palisade arrangement of cells is called ___________ .

a. pleomorphic division

b. endospore formation

c. snapping division

d. binary fission

Which of the following terms best describes stiff, spiral-shaped prokaryotic cells?

a. cocci

b. bacilli

c. spirilla

d. spirochetes

Flexible spiral-shaped prokaryotes are __________ .

a. spirilla

b. spirochetes

c. vibrios

d. rickettsias

A student was memorizing the arrangements of bacteria and noticed that there are more arrangements for cocci than for bacilli. Why might this be so?

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ If you were to view staphylococci, you should expect to see clusters of cells.