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Objective Questions
1) Which of the following is not a distinguishing characteristic of prokaryotic cells?
A) Their DNA is not associated with histones.
B) They lack membrane-enclosed organelles.
C) Their DNA is not enclosed within a membrane.
D) They have cell walls containing peptidoglycan.
E) None of the above.
2) Which of the following is not true about a gram-positive cell wall?
A) It protects the cell in a hypertonic environment.
B) It is sensitive to lysozyme.
C) It maintains the shape of the cell.
D) It contains teichoic acids.
E) None of the above.
3) Which of the following best describes what happens when a bacterial cell is placed in a solution containing
5% NaCl?
A) Water will move into the cell.
B) Sucrose will move into the cell from a higher to a lower concentration.
C) The cell will undergo osmotic lysis.
D) Water will move out of the cell.
E) No change will result; the solution is isotonic.
4) The best definition of osmotic pressure is
A) The movement of solute molecules from a higher to a lower concentration.
B) The movement of a substance across a semi-permeable membrane from a higher to a lower
concentration.
C) The force with which a solvent moves across a semi-permeable membrane from a higher to a lower
concentration.
D) The movement of solute molecules from a lower to a higher concentration across a semi-permeable
membrane.
E) The active transport of a substance out of a cell to maintain equilibrium.
5) By which of the following mechanisms can a cell transport a substance from a lower to a higher
concentration?
A) Extracellular enzymes
B) Facilitated diffusion
C) Simple diffusion
D) Active transport
E) Any of the above
6) Which of the following is not a characteristic of the plasma membrane?
A) The site of cell wall formation
B) Selectively permeable
C) Composed of a phospholipid bilayer
D) Maintains cell shape
E) Contains proteins
7) All of the following are lacking a cell wall except
A) Animal cells.
B) Fungi.
C) Protoplasts.
D) Mycoplasmas.
E) L forms.
8) Which of the following statements is true?
A) A cell can produce many endospores.
B) Endospores are for reproduction.
C) Endospores allow a cell to survive environmental changes.
D) Endospores are easily stained in a Gram stain.
E) A cell produces one endospore and keeps growing.
9) Which of the following pairs is mismatched?
A) Golgi complex secretion
B) Lysosome digestive enzymes
C) Mitochondria ATP production
D) Endoplasmic reticulum internal transport
E) Centrosome food storage
10) Which of the following organelles most closely resembles a prokaryotic cell?
A) Mitochondrion
B) Cell wall
C) Golgi complex
D) Vacuole
E) Nucleus
Figure 4.1
11) In Figure 4.1, which drawing is a tetrad?
A) a
B) b
C) c
D) d
E) e
12) In Figure 4.1, which drawing possesses an axial filament?
A) a
B) b
C) c
D) d
E) e
13) In Figure 4.1, which drawing is streptococci?
A) a
B) b
C) c
D) d
E) e
14) In Figure 4.1, which drawing is bacilli?
A) a
B) b
C) c
D) d
E) e
15) Which of the following is generally not true of prokaryotic cells?
A) They reproduce by binary fission.
B) They possess 80S ribosomes.
C) They are motile by means of flagella.
D) They have a semirigid cell wall.
E) None of the above.
16) Which of the following is not true about gram-negative cell walls?
A) Their Gram reaction is due to the outer membrane.
B) They have an extra outer layer composed of lipoproteins, lipopolysaccharides, and phospholipids.
C) They protect the cell in a hypotonic environment.
D) They are toxic to humans.
E) They are sensitive to penicillin.
Skill: Analysis
17) Which of the following is not a structure found in prokaryotic cells?
A)
B)
C)
D)
E)
Pili
Axial filament
Flagella
Peritrichous flagella
Cilia
18) Which of the following is not true about the glycocalyx?
A) It may be composed of polypeptide.
B) It may be responsible for virulence.
C) It is used to adhere to surfaces.
D) It may be composed of polysaccharide.
E) None of the above.
19) Which of the following is not a chemical component of a bacterial cell wall?
A) N-acetylmuramic acid
B) Peptide chains
C) Peptidoglycan
D) Teichoic acids
E) Cellulose
20) Which of the following is not part of the active transport process?
A) Plasma membrane
B) ATP
C) Transporter proteins
D) Cell wall
E) None of the above
Figure 4.2
21) Which of the following terms best describes the cell in Figure 4.2?
A) Axial filament
B) Peritrichous flagella
C) Monotrichous flagella
D) Lophotrichous flagella
E) Amphitrichous flagella
22) In bacteria, photosynthetic pigments are found in
A) Chloroplasts.
B) Chromatophores.
C) Cytoplasm.
D) Mesosomes.
E) None of the above.
23) The difference between simple diffusion and facilitated diffusion is that facilitated diffusion
A) Can move materials from a higher to a lower concentration.
B) Requires ATP.
C) Can move materials from a lower to a higher concentration.
D) Requires transporter proteins.
E) Doesn't require ATP.
24) Possible functions of magnetosomes include all of the following except
A) Get cells to the North Pole.
B) Protect cells from hydrogen peroxide accumulation.
C) Locate suitable environments.
D) Composed of iron oxide.
E) None of the above.
25) Which of the following cell structures has a role in the initiation of disease?
A) Gram-positive cell wall
B) Fimbriae
C) Cell membrane
D) Lipid A
E) All of the above
26) Fimbriae and pili differ in that pili
A) Are used for asexual reproduction.
B) Are used to transfer DNA.
C) Are composed of pilin.
D) Are composed of flagellin.
E) Are used for attachment.
Figure 4.3
27) In Figure 4.3, which diagram of a cell wall is a gram-negative cell wall?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
28) In Figure 4.3, which diagram of a cell wall is a toxic cell wall?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
29) In Figure 4.3, which diagram of a cell wall has a wall that protects against osmotic lysis?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
30) In Figure 4.3, which diagram of a cell wall is decolorized by acetone-alcohol?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
31) In Figure 4.3, which diagram of a cell wall is resistant to many antibiotics (e.g., penicillin)?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
32) In Figure 4.3, which diagram of a cell wall contains teichoic acids?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
33) In Figure 4.3, which diagram of a cell wall contains porins?
A) a
B) b
C) Both a and b
D) Neither a nor b
E) Can't tell
34) Where are phospholipids most likely found in a prokaryotic cell?
A) Around organelles
B) Flagella
C) Ribosomes
D) Plasma membrane
E) B and C
35) Where are phospholipids most likely found in a eukaryotic cell?
A) Flagella
B) Around organelles
C) Plasma membrane
D) Ribosomes
E) B and C
36) All of the following can be found in mitochondria and prokaryotes except
A) 70S ribosomes.
B) Binary fission.
C) Circular chromosome.
D) Cell wall.
E) ATP-generating mechanism.
37) Found in archaea.
A) Peptidoglycan
B) Sterol-rich cell membranes
C) Nucleus
D) Pseudomurein
E) A and C
38) Found in mycoplasmas.
A) Pseudomurein
B) Peptidoglycan
C) Nucleus
D) Sterol-rich cell membranes
E) A and C
39) You have isolated a motile, gram-positive cell with no visible nucleus. You can safely assume that the cell
A) Has a mitochondrion.
B) Has 9 pairs + 2 flagella.
C) Lives in an extreme environment.
D) Has a nucleus.
E) Has a cell wall.
40) What will happen if a bacterial cell is placed in distilled water with lysozyme?
A) The cell will undergo osmotic lysis.
B) No change will result; the solution is isotonic.
C) Lysozyme will diffuse into the cell.
D) Water will leave the cell.
E) The cell will plasmolyze.
41) What will happen if a bacterial cell is placed in 10% NaCl with penicillin?
A) Penicillin will diffuse into the cell.
B) The cell will undergo osmotic lysis.
C) Water will enter the cell.
D) The cell will plasmolyze.
E) No change will result; the solution is isotonic.
42) Which one of the following pairs is not correctly matched?
A) Metachromatic granules phosphate storage
B) Sulfur granules energy reserve
C) Gas vacuoles flotation
D) Ribosomes protein storage
E) Lipid inclusions energy reserve
43) All of the following are energy reserves except
A) Polysaccharide granules.
B) Carboxysomes.
C) Lipid inclusions.
D) Metachromatic granules.
E) Sulfur granules.
44) Which one of the following is not a functionally analogous pair?
A) 9+2 flagella bacterial flagella
B) Nucleus nuclear region
C) Cilia pili
D) Mitochondria procaryotic plasma membrane
E) Chloroplasts thylakoids
45) The bacteria on the outside of termite protozoa
A) Are transient microbiota.
B) Propel the protozoan.
C) Digest cellulose.
D) Steer the protozoan to food.
E) None of the above