Microbiology Chapter 4 Prokaryotes

20 Questions | By Pharmdnate | Updated: Mar 22, 2022 | Attempts: 3557

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1.

Which of the following is the smallest virus?
- A.
  
  Influenza virus
- B.
  
  AIDS virus
- C.
  
  Measles virus
- D.
  
  Poliovirus
- E.
  
  West Nile virus
2.

What mircoscope will help to see the stucture of viruses?
- A.
  
  Confocal
- B.
  
  Scanning
- C.
  
  Transmission
- D.
  
  A and B
- E.
  
  B and C
3.

What is not true about prokaryotes?
- A.
  
  A cell wall is usually present and is cemically complex
- B.
  
  The flagella is complex and consist of mutiple microtubules
- C.
  
  Cell division occurs by binary fission
- D.
  
  Ribosomes are the smaller size 70S
- E.
  
  No meiosis, only transfer of DNA fragments
4.

What is not true about eukaryotes?
- A.
  
  Mitosis
- B.
  
  Cell wall, if present, is chemically simple
- C.
  
  Larger size 80S ribosome located in organelles
- D.
  
  Glycocalyx present in some cells that lack a cell wall
- E.
  
  Tyically 10 to 100 nanometers in diameter
5.

What is not a function of a bacterial cell wall?
- A.
  
  Attachment sites for bacteriophages
- B.
  
  Maintain cell shape
- C.
  
  Platform for surface appendages
- D.
  
  Counter acting the effects of osmotic pressure
- E.
  
  Locomotion for most of the cell
6.

Uncapsulated bacteria are the most dangerous.
- A.
  
  True
- B.
  
  False
7.

What is not true about gram positive cell wall?
- A.
  
  Consists of many polymer layers of peptidoglycan connected by amino acid bridges
- B.
  
  Comprised of a low percentage of peptidoglycans
- C.
  
  Has an alternating sequence of N-aceylglucosamine and N-acetyl-muraminic acid
- D.
  
  Peptidoglycan layers are connected to the other by a brigde made of amino acids and amino acid derivates
- E.
  
  Lipoteichoic acid and teichoic acid are found
8.

What separates the outer plasma membrane from the peptidoglycan layer in gram negative cell walls?
- A.
  
  Lipid A
- B.
  
  Lipopolysaccharide layer (LPS layer)
- C.
  
  Fimbriae
- D.
  
  Periplasmic space
- E.
  
  Dipicolinate acid
9.

What is located adjacent to the exterior peptidoglycan layer in gram negative cell walls?
- A.
  
  Lipid A
- B.
  
  Lipopolysaccharide layer (LPS layer)
- C.
  
  Fimbriae
- D.
  
  Periplasmic space
- E.
  
  Dipicolinate acid
10.

The lipid portion of the LPS layer contains a toxic substance called what?
- A.
  
  Lipid A
- B.
  
  Lipoposaccharide layer (LPS layer)
- C.
  
  Small acid-soluble spore proteins (SASPS)
- D.
  
  Periplasmic space
- E.
  
  Strong spore coat
11.

What is false about gram positive bacteria?
- A.
  
  Its flagellar structure has two rings in the basal body
- B.
  
  Has high susceptibility to penicillin and sulfanamide
- C.
  
  Has low susceptibility to streptomycin, chloramphenicol and tetracycline
- D.
  
  Lipid and lipoprotein content is low
- E.
  
  Resistant to onionic detergents, sodium ozide and drying
12.

What is not true about gram negative bacteria?
- A.
  
  High susceptibility to penicilin and streptomycin
- B.
  
  Peptidoglycan layer is thin
- C.
  
  Low resistance to sodium ozide and drying
- D.
  
  Low susceptibility to onionic detergents
- E.
  
  Low inhibition by basic dyes
13.

What chemical produced by endospores is thought to lend to their high resistance?
- A.
  
  Mot-A
- B.
  
  Small acid-soluble spore proteins (SASPS)
- C.
  
  Dipicolinic acid (DPA)
- D.
  
  Fimbriae
- E.
  
  Protein switch
14.

What protects the DNA of the spore cell from UV radiation, dessication and dry heat?
- A.
  
  Mot-B
- B.
  
  Small acid-soluble proteins (SASPS)
- C.
  
  Dipicolinic acid (DPA)
- D.
  
  Fimbriae
- E.
  
  Protein switch
15.

What is the conversion back to a vegetative cell?
- A.
  
  Transformation
- B.
  
  Polymorphism
- C.
  
  Pleomorphism
- D.
  
  Staining
- E.
  
  Germination
16.

What contributes to an endospores' resistance and is composed of highly crosslinked Keratin?
- A.
  
  Lipid A
- B.
  
  Fimbriae
- C.
  
  Periplasmic space
- D.
  
  Strong spore coat
- E.
  
  Protein switch
17.

Which of the following is an example central endospore?
- A.
  
  Bacillus megaturium
- B.
  
  Spirillum minor
- C.
  
  Salmonella
- D.
  
  Spirillum volutans
- E.
  
  Vibrio cholera
18.

Which of the following is a lophotrichous?
- A.
  
  Spirillum minor
- B.
  
  Spirillum volutans
- C.
  
  Salmonella
- D.
  
  Clostrium tetani
- E.
  
  Vibrio cholera
19.

What are short attachment pili called?
- A.
  
  F
- B.
  
  Sex pili
- C.
  
  Fimbriae
- D.
  
  Flagella
- E.
  
  Vegetative cells
20.

What is the appearance of two or more distinctly different forms in the life cycle of some organisms?
- A.
  
  Transformation
- B.
  
  Polymorphism
- C.
  
  Pleomorphism
- D.
  
  Staining
- E.
  
  Germination

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Microbiology Chapter 4 Prokaryotes

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