Cytoplasmic Membrane Microbiology Quiz Questions

67 Questions | By Andreazza | Updated: Mar 21, 2022 | Attempts: 261

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Cytoplasmic Membrane Microbiology Quiz Questions - Quiz

Chapter 3 Microbiology

Questions and Answers

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.