Cytoplasmic Membrane Microbiology Quiz Questions
Chapter 3 Microbiology
- 1.The concept of a prokaryote was first fully outlined in 1962 by
- A.
Watson and Crick
- B.
Stanier and Van Niel
- C.
Hersey and Chase
- D.
Gilbert and Cech
- 2.The genus of bacteria that undergoes cell division in random planes, forming grapelike clusters of round bacteria, are the __________.
- 3.Bacteria that do not have a fixed shape are said to be __________.
- 4.A branched network of hyphae formed by the Actinomycetes is called a __________.
- 5.Actinomycetes form long filaments called ___________.
- 6.The term used to describe bacteria that are intermediate in shape between spherical and rod shaped is
- A.
Cocci
- B.
Bacilli
- C.
Vibrio
- D.
Coccobacilli
- 7.Bacterial cells that are variable in shape are called
- A.
Vibrio
- B.
Pleomophic
- C.
Coccobacilli
- D.
Hyphal
- 8.Square planar arrangement of cells that forms when round bacteria remain attached to each other during reproduction are called
- A.
Streptococci
- B.
Staphylococci
- C.
Tetrads
- D.
Sarcinae
- 9.Flexible bacteria with a helical shape are called
- A.
Vibrios
- B.
Spirilla
- C.
Spirochetes
- D.
Coccobacilli
- 10.Rigid bacteria with a helical cell shape are called
- A.
Vibrios
- B.
Spirilla
- C.
Spirochetes
- D.
Coccobacilli
- 11.The term used to describe bacteria that are shaped like curved rods is
- A.
Coccus
- B.
Bacillus
- C.
Vibrio
- D.
Coccobacillus
- 12.The term used to describe bacteria that are rod shaped is
- A.
Coccus
- B.
Bacillus
- C.
Vibrio
- D.
Coccobacillus
- 13.The term used to describe bacteria that have a spherical shape is
- A.
Coccus
- B.
Bacillus
- C.
Vibrio
- D.
Coccobacillus
- 14.Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.
- A.
True
- B.
False
- 15.The cytoplasmic membrane of bacteria
- A.
Retains the cytoplasm and its contents.
- B.
Acts as a selectively permeable barrier, allowing some molecules to pass while preventing the movement of others.
- C.
Is the major site of ATP synthesis in aerobes.
- D.
All of the choices
- 16.The lipopolysaccharide (LPS) that is found in the outer membrane of gram-negative bacteria is also known as
- A.
Exotoxin
- B.
Teichoic acid
- C.
Murein
- D.
Endotoxin
- 17.Which of the following is/are true of capsules?
- A.
They help bacteria escape phagocytosis by host cells.
- B.
They retain water and help prevent desiccation of the bacteria.
- C.
They prevent entry of many bacterial viruses.
- D.
All of the choices
- 18.Proteins that are loosely associated with the cytoplasmic membrane are called __________ proteins.
- A.
Peripheral
- B.
Integral
- C.
External
- D.
Internal
- 19.Proteins that are embedded within the cytoplasmic membrane and not easily extracted are called __________ proteins.
- A.
Peripheral
- B.
Integral
- C.
External
- D.
Internal
- 20.Shrinkage of the plasma membrane away from the cell wall when the bacterium is placed in a hypertonic environment is called
- A.
Osmolysis.
- B.
Plasmolysis
- C.
Hydrolysis
- D.
Hypertonolysis
- 21.Lipids with polar and nonpolar ends are said to be
- A.
Amphipathic
- B.
Amphibolic
- C.
Bilateral
- D.
None of the choices
- 22.Although penicillin inhibits peptidoglycan synthesis, bacterial cells will continue to grow normally in the presence of penicillin in a(n) __________ environment.
- A.
Hypotonic
- B.
Isotonic
- C.
Hypertonic
- D.
Nonpolar
- 23.All of the following statements about the periplasmic space are true except:
- A.
It is found only in gram-positive bacteria.
- B.
It is located between the plasma membrane and outer membrane of gram-negative bacteria.
- C.
T contains hydrolytic enzymes and binding proteins involved in nutrient acquisition.
- D.
All of the above
- 24.Which of the following protects bacteria from lysis in dilute solutions and helps to determine their cellular morphology or shape?
- A.
Plasma membrane
- B.
Peptidoglycan
- C.
Capsule
- D.
Gas vacuoles
- 25.Sortase is a protein enzyme of bacteria that
- A.
Plays a key role in directing proteins to the periplasm.
- B.
Catalyzes covalent attachment of some surface proteins to peptidoglycan.
- C.
Directs secretion of proteins across the outer membrane.
- D.
Functions by transporting flagellum proteins to their extracellular site of assembly.
Questions: 45 | Attempts: 23246 | Last updated: Aug 20, 2020
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