Microbiology Chapter 4-TEST 1 Microbial Cell Structure and Function Exam :
Prokaryotic vs Eukaryotic Differentiation, Gram-Positive and Gram-Negative Cell
Walls, Peptidoglycan and Pseudomurein Composition, Teichoic Acids,
Lipopolysaccharides, Osmotic Pressure Dynamics, Plasmolysis, Osmotic Lysis,
Active and Facilitated Transport Mechanisms, Phospholipid Bilayers, Glycocalyx,
Capsule and Slime Layer Roles, Flagella, Pili, Fimbriae, Axial Filaments,
Peritrichous and Monotrichous Arrangements, Endospore Formation and
Survival, Binary Fission, Photosynthetic Chromatophores, Magnetosomes,
Inclusion Bodies, Metachromatic Granules, Lipid and Sulfur Reserves, Ribosomal
Structure and Function, Mitochondrial Analogs, Horizontal Gene Transfer,
Antibiotic Sensitivity and Resistance, Cell Wall-Targeting Enzymes, Structural
Adaptations in Extremophiles, and Comparative Functional Morphology of
Bacteria, Archaea, Mycoplasmas, and Protozoan Symbionts Exam Questions
Verified and Provided with Complete A+ Graded Rationales Latest Updated 2026
Which of the following is not a distinguishing characteristic of prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They have cell walls containing peptidoglycan.
D) Their DNA is not associated with histones.
E) None of the above.
Answer: E
,Which of the following is not true about a gram-positive cell wall?
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) None of the above.
Answer: C)
Which of the following best describes what happens when a bacterial cell is placed in a
solution containing 5% 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: C)
The best definition of osmotic pressure is
A) The movement of solute molecules from a higher to a lower concentration.
B) The force with which a solvent moves across a semi-permeable membrane from a higher
to a lower concentration.
C) The movement of a substance across a semi-permeable membrane from a higher to a
, lower concentration.
D) The active transport of a substance out of a cell to maintain equilibrium.
E) The movement of solute molecules from a lower to a higher concentration across a
semi-permeable membrane.
Answer: B)
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
C) Active transport
D) Extracellular enzymes
E) Any of the above
Answer: C)
Which of the following is not a characteristic of the plasma membrane?
A) Maintains cell shape
B) Composed of a phospholipid bilayer
C) Contains proteins
D) The site of cell wall formation
E) Selectively permeable
Answer: A)
Prokaryotic vs Eukaryotic Differentiation, Gram-Positive and Gram-Negative Cell
Walls, Peptidoglycan and Pseudomurein Composition, Teichoic Acids,
Lipopolysaccharides, Osmotic Pressure Dynamics, Plasmolysis, Osmotic Lysis,
Active and Facilitated Transport Mechanisms, Phospholipid Bilayers, Glycocalyx,
Capsule and Slime Layer Roles, Flagella, Pili, Fimbriae, Axial Filaments,
Peritrichous and Monotrichous Arrangements, Endospore Formation and
Survival, Binary Fission, Photosynthetic Chromatophores, Magnetosomes,
Inclusion Bodies, Metachromatic Granules, Lipid and Sulfur Reserves, Ribosomal
Structure and Function, Mitochondrial Analogs, Horizontal Gene Transfer,
Antibiotic Sensitivity and Resistance, Cell Wall-Targeting Enzymes, Structural
Adaptations in Extremophiles, and Comparative Functional Morphology of
Bacteria, Archaea, Mycoplasmas, and Protozoan Symbionts Exam Questions
Verified and Provided with Complete A+ Graded Rationales Latest Updated 2026
Which of the following is not a distinguishing characteristic of prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They have cell walls containing peptidoglycan.
D) Their DNA is not associated with histones.
E) None of the above.
Answer: E
,Which of the following is not true about a gram-positive cell wall?
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) None of the above.
Answer: C)
Which of the following best describes what happens when a bacterial cell is placed in a
solution containing 5% 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: C)
The best definition of osmotic pressure is
A) The movement of solute molecules from a higher to a lower concentration.
B) The force with which a solvent moves across a semi-permeable membrane from a higher
to a lower concentration.
C) The movement of a substance across a semi-permeable membrane from a higher to a
, lower concentration.
D) The active transport of a substance out of a cell to maintain equilibrium.
E) The movement of solute molecules from a lower to a higher concentration across a
semi-permeable membrane.
Answer: B)
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
C) Active transport
D) Extracellular enzymes
E) Any of the above
Answer: C)
Which of the following is not a characteristic of the plasma membrane?
A) Maintains cell shape
B) Composed of a phospholipid bilayer
C) Contains proteins
D) The site of cell wall formation
E) Selectively permeable
Answer: A)
