2024-2025 NEWEST MICROBIOLOGY CHAPTER 4 COMPLETE
QUESTIONS AND ANSWERS (100% SURE PASS, 100% RATED
CORRECT, 100% VERIFIED!!(GRADED A+)
1) Which of the following statements is INCORRECT regarding prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They typically have a circular chromosome.
D) They reproduce by binary fission.
E) They lack a plasma membrane. - (ANSWER)Answer: E
Plasmalyzed - (ANSWER)plant membrane departs from cell wall (hypertonic)
binary fission - (ANSWER)A form of asexual reproduction in which one cell divides to form two
identical cells.
Hypertonic - (ANSWER)when comparing two solutions, the solution with the greater
concentration of solutes
,Lysozyme - (ANSWER)an enzyme found in saliva and sweat and tears that destroys the cell
walls of certain bacteria
Teichoic acids - (ANSWER)gram positive
2) Each of the following statements concerning the gram-positive cell wall is true EXCEPT
A) it maintains the shape of the cell.
B) it is sensitive to lysozyme.
C) it protects the cell in a hypertonic environment.
D) it contains teichoic acids.
E) it is sensitive to penicillin. - (ANSWER)Answer: C
NaCl - (ANSWER)sodium chloride (salt)
3) Which of the following statements best describes what happens when a bacterial cell is placed
in a solution containing 5 percent NaCl?
A) Sucrose will move into the cell from a higher to a lower concentration.
B) The cell will undergo osmotic lysis.
C) Water will move out of the cell.
, D) Water will move into the cell.
E) No change will result; the solution is isotonic. - (ANSWER)Answer: C
Conjugation in bacteria - (ANSWER)Bacterial cells can join together and pass plasmid DNA
from one bacterial cell to another. This process can take place between bacteria of different
species and is of concern in terms of passing plasmid-located genes for antibiotic resistance.
4) A gram-positive bacteria suddenly acquires resistance to the antibiotic methicillin. This trait
most likely occurred due to
A) conjugation.
B) binary fission.
C) meisosis.
D) transformation.
E) transduction. - (ANSWER)Answer: A
5) By which of the following mechanisms can a cell transport a substance from a lower to a
higher concentration?
A) simple diffusion
B) facilitated diffusion
QUESTIONS AND ANSWERS (100% SURE PASS, 100% RATED
CORRECT, 100% VERIFIED!!(GRADED A+)
1) Which of the following statements is INCORRECT regarding prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They typically have a circular chromosome.
D) They reproduce by binary fission.
E) They lack a plasma membrane. - (ANSWER)Answer: E
Plasmalyzed - (ANSWER)plant membrane departs from cell wall (hypertonic)
binary fission - (ANSWER)A form of asexual reproduction in which one cell divides to form two
identical cells.
Hypertonic - (ANSWER)when comparing two solutions, the solution with the greater
concentration of solutes
,Lysozyme - (ANSWER)an enzyme found in saliva and sweat and tears that destroys the cell
walls of certain bacteria
Teichoic acids - (ANSWER)gram positive
2) Each of the following statements concerning the gram-positive cell wall is true EXCEPT
A) it maintains the shape of the cell.
B) it is sensitive to lysozyme.
C) it protects the cell in a hypertonic environment.
D) it contains teichoic acids.
E) it is sensitive to penicillin. - (ANSWER)Answer: C
NaCl - (ANSWER)sodium chloride (salt)
3) Which of the following statements best describes what happens when a bacterial cell is placed
in a solution containing 5 percent NaCl?
A) Sucrose will move into the cell from a higher to a lower concentration.
B) The cell will undergo osmotic lysis.
C) Water will move out of the cell.
, D) Water will move into the cell.
E) No change will result; the solution is isotonic. - (ANSWER)Answer: C
Conjugation in bacteria - (ANSWER)Bacterial cells can join together and pass plasmid DNA
from one bacterial cell to another. This process can take place between bacteria of different
species and is of concern in terms of passing plasmid-located genes for antibiotic resistance.
4) A gram-positive bacteria suddenly acquires resistance to the antibiotic methicillin. This trait
most likely occurred due to
A) conjugation.
B) binary fission.
C) meisosis.
D) transformation.
E) transduction. - (ANSWER)Answer: A
5) By which of the following mechanisms can a cell transport a substance from a lower to a
higher concentration?
A) simple diffusion
B) facilitated diffusion
