Ch 4 micro

Card Set Information

Author:
XQWCat
ID:
173835
Filename:
Ch 4 micro
Updated:
2012-09-27 09:22:35
Tags:
microbiology
Folders:

Description:
chapter 4 microbiology
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user XQWCat on FreezingBlue Flashcards. What would you like to do?


  1. 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) They lack a plasma membrane.
    E
  2. Which of the following statements about a gram-positive cell wall is false? 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.
    C
  3. Which of the following statements 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
    C
  4. 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 semipermeable membrane from a higher to a lower concentration. C) The movement of a substance across a semipermeable 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 semipermeable membrane.
    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) Aquaporins
    C
  6. Which of the following is NOT a characteristic of the plasma membrane? A) Maintains cell shape B) Is composed of a phospholipid bilayer C) Contains proteins D) Is the site of cell wall formation E) Is selectively permeable
    A
  7. 7) Which of the following have a cell wall?
    A) Protoplasts B) Fungi C) L forms D) Mycoplasmas E) Animal cells
    B
  8. Which of the following statements is true? A) Endospores are for reproduction. B) Endospores allow a cell to survive environmental changes. C) Endospores are easily stained in a Gram stain. D) A cell produces one endospore and keeps growing. E) A cell can produce many endospores.
    B
  9. Which of the following pairs is mismatched? A) Endoplasmic reticulum — internal transport B) Golgi complex — secretion C) Mitochondria — ATP production D) Centrosome — food storage E) Lysosome — digestive enzymes
    D
  10. Which of the following organelles most closely resembles a prokaryotic cell? A) Nucleus B) Mitochondrion C) Golgi complex D) Vacuole E) Cell wall
    B
  11. Which of the following statements about prokaryotic cells is generally false? A) They have a semirigid cell wall. B) They are motile by means of flagella. C) They possess 80S ribosomes. D) They reproduce by binary fission. E) They lack membrane-bound nuclei.
    C
  12. Which of the following statements about gram-negative cell walls is false? A) They protect the cell in a hypotonic environment. B) They have an extra outer layer composed of lipoproteins, lipopolysaccharides, and phospholipids. C) They are toxic to humans. D) They are sensitive to penicillin. E) Their Gram reaction is due to the outer membrane.
    D
  13. Which of the following structures is NOT found in prokaryotic cells? A) Flagellum B) Axial filament C) Cilium D) Pilus E) Peritrichous flagella
    C
  14. Which of the following statements about the glycocalyx is false? A) It may be composed of polysaccharide. B) It may be composed of polypeptide. C) It may be responsible for virulence. D) It is used to adhere to surfaces. E) It protects from osmotic lysis
    E
  15. Which of the following is NOT a chemical component of a bacterial cell wall? A) Cellulose B) Peptidoglycan C) Teichoic acids D) Peptide chains E) N-acetylmuramic acid
    A
  16. Which of the following is NOT part of the active transport process? A) Plasma membrane B) Transporter proteins C) ATP D) Cell wall E) None of the above
    D
  17. In bacteria, photosynthetic pigments are found in A) Chloroplasts. B) Cytoplasm. C) Chromatophores. D) Mesosomes. E) Ribosomes.
    C
  18. Which of the following terms best describes the cell in Figure 4.2? (bacillus with ponytail)
     A) Peritrichous flagella B) Amphitrichous flagella C) Lophotrichous flagella D) Monotrichous flagella E) Axial filament
    C
  19. In bacteria, photosynthetic pigments are found in A) Chloroplasts. B) Cytoplasm. C) Chromatophores. D) Mesosomes. E) Ribosomes.
    C
  20. The difference between simple diffusion and facilitated diffusion is that facilitated diffusion A) Can move materials from a higher to a lower concentration. B) Can move materials from a lower to a higher concentration. C) Requires ATP. D) Requires transporter proteins. E) Doesn't require ATP.
    D
  21. Which of the following is NOT a possible function of magnetosomes? A) Get cells to the North Pole B) Protect cells from hydrogen peroxide accumulation C) Store iron D) Locate suitable environments
    A
  22. You have isolated a motile, gram-positive cell with no visible nucleus. You can safely assume that the cell A) Has 9 pairs + 2 flagella. B) Has a mitochondrion. C) Has a cell wall. D) Lives in an extreme environment. E) Has a nucleus.
    C
  23.  Fimbriae and pili differ in that pili
    A) Are composed of pilin. B) Are composed of flagellin. C) Are used to transfer DNA. D) Are used for motility. E) Are used for attachment
    D
  24. Gram+(A) or Gram-(B)  is a toxic cell wall? A) a B) b C) Both a and b D) Neither a nor b E) Can't tell
    B
  25. Gram+(A) or Gram-(B) 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
    C
  26. Gram+(A) or Gram-(B) l is decolorized by acetone-alcohol? A) a B) b C) Both a and b D) Neither a nor b E) Can't tell
    B
  27. Gram+(A) or Gram-(B) is resistant to many antibiotics (e.g., penicillin)? A) a
    B
  28. Gram+(A) or Gram-(B) contains teichoic acids? A) a B) b C) Both a and b D) Neither a nor b E) Can't tell
    A
  29. Gram+(A) or Gram-(B) contains porins? A) a B) b C) Both a and b D) Neither a nor b E) Can't tell
    B
  30. Where are phospholipids most likely found in a prokaryotic cell? A) Flagella B) Around organelles C) Plasma membrane D) Ribosomes E) B and C
    C
  31. Where are phospholipids most likely found in a eukaryotic cell? A) Flagella B) Around organelles C) Plasma membrane D) Ribosomes E) B and C 
    E
  32. Which of the following is NOT found in mitochondria and prokaryotes? A) Circular chromosome B) 70S ribosomes C) Cell wall D) Binary fission E) ATP-generating mechanism
    C
  33. What will happen if a bacterial cell is placed in distilled water with lysozyme? A) The cell will plasmolyze. B) The cell will undergo osmotic lysis. C) Water will leave the cell. D) Lysozyme will diffuse into the cell. E) No change will result; the solution is isotonic.
    B
  34. What will happen if a bacterial cell is placed in 10% NaCl with penicillin? A) The cell will plasmolyze. B) The cell will undergo osmotic lysis. C) Water will enter the cell. D) Penicillin will diffuse into the cell. E) No change will result; the solution is isotonic
    A
  35. Which one of the following pairs is mismatched?
    A) Metachromatic granules — phosphate storage B) Lipid inclusions — energy reserve C) Ribosomes — protein storage D) Sulfur granules — energy reserve E) Gas vacuoles — flotation
    C
  36. Which of the following are NOT energy reserves? A) Carboxysomes. B) Polysaccharide granules. C) Lipid inclusions. D) Sulfur granules. E) Metachromatic granules.
    A
  37. Which of the following pairs is NOT a functionally analogous pair? A) Nucleus — nuclear region B) Mitochondria — prokaryotic plasma membrane C) Chloroplasts — thylakoids D) Cilia — pili E) 9+2 flagella — bacterial flagella
    D
  38. The bacteria on the outside of termite protozoa A) Digest cellulose. B) Steer the protozoan to food. C) Are transient microbiota. D) Propel the protozoan. E) None of the above
    D

What would you like to do?

Home > Flashcards > Print Preview