7. Prokaryotic Cell Structures & Functions

Which of the following components of the gram-negative cell wall anchors the outer membrane to the thin peptidoglycan layer?

What part of Lipopolysaccharide is the endotoxin during bacterial infections?

Which of the following statements regarding porins is TRUE?

Use the following choices to answer questions 2–4.

a. No change will result; the solution is isotonic.

b. Water will move into the cell.

c. Water will move out of the cell.

d. The cell will undergo osmotic lysis.

e. Sucrose will move into the cell from an area of higher concentration to one of lower concentration.

Which statement best describes what happens when a gram-negative bacterium is placed in distilled water and penicillin?

Which of the following does not belong with the others?

a. Enterobacteriales

b. Lactobacillales

c. Legionellales

d. Pasteurellales

e. Vibrionales

Which of the following is an intracellular parasite?

a. Rickettsia

b. Mycobacterium

c. Bacillus

d. Staphylococcus

e. Streptococcus

When Legionella was newly discovered, why was it classified with the pseudomonads?

a. It is a pathogen.

b. It is an aerobic gram-negative rod.

c. It is difficult to culture.

d. It is found in water.

e. none of the above

NAME IT These aerobic, gram-negative bacteria produce tracheal cytotoxin that kills ciliated cells of the trachea.

NAME IT Intracellular reticulate bodies of this gram-negative bacterium convert to elementary bodies that can infect a new host cell.