Tortora 14th EditionCh. 4 - Functional Anatomy of Prokaryotic and Eukaryotic CellsProblem 4.4a
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05:59Use 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?
DRAW IT Draw the bacterial shapes listed in (a), (b), and (c). Then draw the shapes in (d), (e), and (f), showing how they are special conditions of a, b, and c, respectively.
a. spiral
b. bacillus
c. coccus
d. spirochetes
e. staphylococci
f. streptobacilli
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?
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 statements best describes what happens to a cell exposed to polymyxins that destroy phospholipids?
a. In an isotonic solution, nothing will happen.
b. In a hypotonic solution, the cell will lyse.
c. Water will move into the cell.
d. Intracellular contents will leak from the cell.
e. Any of the above might happen.
Why is an endospore called a resting structure? Of what advantage is an endospore to a bacterial cell?
