7. Prokaryotic Cell Structures & Functions

You have isolated a motile, gram-positive cell with no visible nucleus. You can assume this cell has

a. ribosomes.

b. mitochondria.

c. an endoplasmic reticulum.

d. a Golgi complex.

e. all of the above

The cell wall of Gram-positive bacteria:

___________ are sugar polymers found in the cell wall of gram-positive bacteria.

Teichoic acids are typically found:

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-positive bacterium is placed in distilled water and penicillin?

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-positive bacterium is placed in an aqueous solution of lysozyme and 10% sucrose?

Which of the following terms is the most specific?

a. bacillus

b. Bacillus

c. gram-positive

d. endospore-forming rods and cocci

e. anaerobic

Which one of the following does not belong with the others?

a. Enterococcus

b. Lactobacillus

c. Staphylococcus

d. Streptococcus

e. All are grouped together.

NAME IT This anaerobic, gram-positive rod is found on the skin. Infections are often treated with retinoids or benzoyl peroxide.

Gram-positive bacteria  __________.

a. have a thick cell wall, which retains crystal violet dye

b. contain teichoic acids in their cell walls

c. appear purple after Gram staining

d. all of the above

Name three groups of low G + C Gram-positive bacteria.