Microbiology Chapter 4 Prokaryotes
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Quiz on prokaryotes.
- 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.
- 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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