Bacteria Morphology(Microbiology ) Questions and Answers

Question 1. In the classification of bacteria according to shape,which among the following refer to cuboidal arrangement of bacterial cells?
  1.    Tetrads
  2.    Staphylococci
  3.    Sarcinae
  4.    Streptococci
Explanation:-
Answer: Option C. -> Sarcinae
Answer: (c).Sarcinae
Question 2. Which group of bacteria among the following have the largest area of contact?
  1.    Palisades
  2.    Trichomes
  3.    Streptobacilli
  4.    Diplobacilli
Explanation:-
Answer: Option B. -> Trichomes
Answer: (b).Trichomes
Question 3. When rod shaped bacteria appears in pairs,it is known as?
  1.    Diplobacilli
  2.    Streptobacilli
  3.    Diplococci
  4.    Staphylococci
Explanation:-
Answer: Option A. -> Diplobacilli
Answer: (a).Diplobacilli
Question 4. Which among the following are “Spirochetes”?
  1.    Spirillum volutans
  2.    Corynebacterium diphtheriae
  3.    Streptomyces sp.
  4.    Treponema pallidum
Explanation:-
Answer: Option D. -> Treponema pallidum
Answer: (d).Treponema pallidum
Question 5. What is the approximate size of the bacterial cell?
  1.    2mm in diameter
  2.    1mm in diameter
  3.    2 micrometer in diameter
  4.    0.5 to 1.0 micrometer in diameter
Explanation:-
Answer: Option D. -> 0.5 to 1.0 micrometer in diameter
Answer: (d).0.5 to 1.0 micrometer in diameter
Question 6. Red extreme halophiles”, are members of the archaebacterial which cannot grow with less than 12 to 15 percent NaCl.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
Explanation:-
Answer: Option A. -> True
Answer: (a).True
Question 7. Which of the following are functions of water in the culture medium?
  1.    nutrients must be in aqueous solution
  2.    cofactor of enzymes
  3.    provides resistance to sudden transient temperature changes
  4.    it is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes.
Explanation:-
Answer: Option D. -> it is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes.
Answer: (d).it is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes.
Question 8. Chromatium okenii uses which of the following compound as electron donor?
  1.    Hydrogen sulphide
  2.    Fatty acids
  3.    Alcohol
  4.    Succinate
Explanation:-
Answer: Option A. -> Hydrogen sulphide
Answer: (a).Hydrogen sulphide
Question 9. Which of the following is a characteristic of beef extract?
  1.    product resulting from the digestion of proteinaceous materials
  2.    aqueous extract of lean beef tissue
  3.    aqueous extract of yeast cells
  4.    complex carbohydrate obtained from certain marine algae
Explanation:-
Answer: Option B. -> aqueous extract of lean beef tissue
Answer: (b).aqueous extract of lean beef tissue
Question 10. Which of the following bacteria can grow both as chemolithotrophs or as chemoorganotrophs?
  1.    Nitrosomonas sp.
  2.    Pseudomonas pseudoflava
  3.    Rhodospirillum rubrum
  4.    Chromatium okenii
Explanation:-
Answer: Option B. -> Pseudomonas pseudoflava
Answer: (b).Pseudomonas pseudoflava
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