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MCQs

Total Questions : 274 | Page 6 of 28 pages
Question 51. 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
Answer: (a).the outer membrane of gram-negative bacteria
Question 52. 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)
Answer: (c).either (a) or (b)
Question 53. 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)
Answer: (a).O-antigen of lipopolysaccharide (LPS)
Question 54. Which of the following does not contain protein?
  1.    Pili
  2.    Flagellum
  3.    Lipoteichoic acid
  4.    Porin
 Discuss Question
Answer: Option C. -> Lipoteichoic acid
Answer: (c).Lipoteichoic acid
Question 55. 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
Answer: (a).positive chemotaxis
Question 56. Gap between outer membrane and plasma membrane is named as
  1.    Mesoderm
  2.    Metaderm
  3.    Plasma
  4.    Periplasma
 Discuss Question
Answer: Option D. -> Periplasma
Answer: (d).Periplasma
Question 57. Circular, double-stranded and extrachromosomal DNA, can replicate independently of bacterial chromosome, called as
  1.    Plasmid
  2.    Cosmic
  3.    Vector
  4.    Template
 Discuss Question
Answer: Option A. -> Plasmid
Answer: (a).Plasmid
Question 58. Pleomorphic' is term used particularly for bacteria, havng
  1.    One shape
  2.    Rods
  3.    Spirals
  4.    Variable shape
 Discuss Question
Answer: Option D. -> Variable shape
Answer: (d).Variable shape
Question 59. What is approximate number of genes in human in contrast to 'prokaryotes' ?
  1.    100000
  2.    1000000
  3.    10000
  4.    200000
 Discuss Question
Answer: Option A. -> 100000
Answer: (a).100000
Question 60. In many clinical laboratories, swelling phenomena, helps in identification of certain organism, named as
  1.    Quelling reaction
  2.    Swelling
  3.    Identification
  4.    Pathology
 Discuss Question
Answer: Option A. -> Quelling reaction
Answer: (a).Quelling reaction

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