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MCQs

Total Questions : 274 | Page 23 of 28 pages
Question 221.  A cluster of polar flagella is called
  1.    lophotrichous
  2.    amphitrichous
  3.    monotrichous
  4.    petritrichous
 Discuss Question
Answer: Option A. -> lophotrichous
Question 222.  Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteria
  1.    50% or more
  2.    About 10%
  3.    11%+ 0.22%
  4.    About 20%
 Discuss Question
Answer: Option A. -> 50% or more
Question 223.  The cooci which mostly occur in single or pairs are
  1.    Streptococci
  2.    Diplococci
  3.    Tetracocci
  4.    None of these
 Discuss Question
Answer: Option B. -> Diplococci
Question 224.  Which of the following may contain fimbriae?
  1.    Gram-positive bacteria
  2.    Gram-negative bacteria
  3.    Both (a) and (b)
  4.    None of these
 Discuss Question
Answer: Option B. -> Gram-negative bacteria
Question 225.  Bacteria having no flagella are unable to
  1.    move
  2.    reproduce
  3.    stick to tissue surfaces
  4.    grow in nutrient agar
 Discuss Question
Answer: Option A. -> move
Question 226. . The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as
  1.    lipase
  2.    lysozyme
  3.    pectinase
  4.    peroxidase
 Discuss Question
Answer: Option B. -> lysozyme
Question 227. . The cell wall of
  1.    gram-positive bacteria are thicker than gram-negative bacteria
  2.    gram-negative bacteria are thicker than gram-positive bacteria
  3.    both have same thickness but composition is different
  4.    none of these
 Discuss Question
Answer: Option A. -> gram-positive bacteria are thicker than gram-negative bacteria
Question 228.  Which of the following is true about cell wall of gram-positive bacteria?
  1.    It consists of multiple layers
  2.    It is thicker than that associated with gram-negative bacteria
  3.    It contains teichoic acids
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 229. . Peptidoglycan is also known as
  1.    N-acetyl muramic acid
  2.    murein mucopeptide
  3.    N acetylglucosamine
  4.    mesodiaminopimetic acid
 Discuss Question
Answer: Option B. -> murein mucopeptide
Question 230. . Which is most likely to be exposed on the surface of a gram-negative bacterium?
  1.    Pore protein (porin)
  2.    Protein involved in energy generation
  3.    Lipoteichoic acid
  4.    Phospholipids
 Discuss Question
Answer: Option A. -> Pore protein (porin)

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