Fish And Seafood(Microbiology ) Questions and Answers

Question 1.  The chief spoilage organisms on smoked fish are
  1.    molds
  2.    bacteria
  3.    both (a) and (b)
  4.    fungi
Explanation:-
Answer: Option A. -> molds
Question 2.  Marinated (sour pickled) fish should not have spoilage problems unless
  1.    the acid content is very high
  2.    the acid content is low enough
  3.    the acid content is moderate
  4.    none of the above
Explanation:-
Answer: Option B. -> the acid content is low enough
Question 3.  In chilled shrimp __________ is chiefly responsible for spoilage.
  1.    Achromobacter
  2.    Pseudomonas
  3.    Micrococcus or Bacillus species
  4.    Molds or yeasts
Explanation:-
Answer: Option A. -> Achromobacter
Question 4.  A musty or muddy odor of the fish is attributed to
  1.    the growth of Streptomyces species in the mud at the bottom of the body of water
  2.    the mud at the bottom of the body of water
  3.    the growth of Pseudomonas species in the mud at the bottom of the body of water
  4.    none of the above
Explanation:-
Answer: Option A. -> the growth of Streptomyces species in the mud at the bottom of the body of water
Question 5.  The red or pink color of the fish is generally caused from the growth of
  1.    Sarcina
  2.    Micrococcus or Bacillus species
  3.    Molds or yeasts
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Question 6.  The bacteria most often involved in the spoilage of fish are
  1.    part of the natural flora of the external slime of fishes and their intestinal contents
  2.    part of the natural flora of the internal slime of fishes only
  3.    both (a) and (b)
  4.    none of the above
Explanation:-
Answer: Option A. -> part of the natural flora of the external slime of fishes and their intestinal contents
Question 7.  The predominant kind of bacteria causing spoilage in fish at chilling temperature is
  1.    species of Pseudomonas
  2.    Micrococcus
  3.    Bacillus
  4.    none of these
Explanation:-
Answer: Option A. -> species of Pseudomonas
Question 8.  
At higher temperatures, the souring of Oysters may be the result of the fermentation of sugars by
  1.    Coliform bacteria
  2.    Streptococci
  3.    Lactobacilli and yeast
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Question 9.  Normally, due to the holding of the chilled fish
  1.    Pseudomonas increase in numbers
  2.    Achromobacters decrease
  3.    Flavobacteria increase temporarily and then decrease
  4.    all of the above
Explanation:-
Answer: Option D. -> all of the above
Question 10. . 
At higher temperatures, the souring of Oysters may be the result of the fermentation of sugars by
  1.    Coliform bacteria
  2.    Streptococci
  3.    Lactobacilli and yeast
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
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