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MCQs

Total Questions : 274 | Page 26 of 28 pages
Question 251. . Microcapsules are composed of
  1.    proteins
  2.    polysaccharides
  3.    lipids
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 252. . Gram positive cells have a
  1.    second outer membrane that helps to retain the crystal violet stain
  2.    multiple layer of peptidoglycan that helps to retain the crystal violet stain
  3.    thick capsule that traps the crystal violet stain
  4.    periplasmic space that traps the crystal violet
 Discuss Question
Answer: Option B. -> multiple layer of peptidoglycan that helps to retain the crystal violet stain
Question 253. . Porins are located in
  1.    the outer membrane of gram-negative bacteria
  2.    the peptidoglycan layer of gram-positive bacteria
  3.    the cytoplasmic membrane of both gram-negative and gram-positive bacteria
  4.    the periplasmic space of gram-negative bacteria
 Discuss Question
Answer: Option A. -> the outer membrane of gram-negative bacteria
Question 254. . In eukaryotic cells, ribosomes are
  1.    70S
  2.    60S
  3.    80S
  4.    Not specific
 Discuss Question
Answer: Option C. -> 80S
Question 255. . Peptidoglycan is found only in the bacterial
  1.    cell membrane
  2.    glycocalyx
  3.    cell wall
  4.    spore
 Discuss Question
Answer: Option C. -> cell wall
Question 256. . Which of the following does not contain protein?
  1.    Pili
  2.    Flagellum
  3.    Lipoteichoic acid
  4.    Porin
 Discuss Question
Answer: Option C. -> Lipoteichoic acid
Question 257. . Which of the following is exposed on the outer surface of a gram-negative bacterium?
  1.    O-antigen of lipopolysaccharide (LPS)
  2.    Polysaccharide portion of lipoteichoic acid (LTA)
  3.    Braun lipoprotein
  4.    Electron transport system components
 Discuss Question
Answer: Option A. -> O-antigen of lipopolysaccharide (LPS)
Question 258. . Chemically the capsule may be
  1.    polypeptide
  2.    polysaccharide
  3.    either (a) or (b)
  4.    none of these
 Discuss Question
Answer: Option C. -> either (a) or (b)
Question 259. . Swimming towards a chemical of bacteria is termed as
  1.    positive chemotaxis
  2.    negative chemotaxis
  3.    phototaxis
  4.    magnetotaxis
 Discuss Question
Answer: Option A. -> positive chemotaxis
Question 260. . Name the component of flagellum.
  1.    Filament
  2.    Hook
  3.    Basal body
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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