Questions and answers for exam Preparation

MCQs

Total Questions : 186 | Page 13 of 19 pages

Question 121. The bacteria most often involved in the spoilage of fish are

part of the natural flora of the external slime of fishes and their intestinal contents
part of the natural flora of the internal slime of fishes only
both (a) and (b)
none of the above

Discuss Question

Answer: Option A. -> part of the natural flora of the external slime of fishes and their intestinal contents
Answer: (a).part of the natural flora of the external slime of fishes and their intestinal contents

Question 122. At higher temperatures, the souring of Oysters may be the result of the fermentation of sugars by

Coliform bacteria
Streptococci
Lactobacilli and yeast
all of these

Discuss Question

Answer: Option D. -> all of these
Answer: (d).all of these

Question 123. The red or pink color of the fish is generally caused from the growth of

Sarcina
Micrococcus or Bacillus species
Molds or yeasts
all of these

Discuss Question

Answer: Option D. -> all of these
Answer: (d).all of these

Question 124. Normally, due to the holding of the chilled fish

Pseudomonas increase in numbers
Achromobacters decrease
Flavobacteria increase temporarily and then decrease
all of the above

Discuss Question

Answer: Option D. -> all of the above
Answer: (d).all of the above

Question 125. Removal of solids is generally considered as a

Primary treatment
Secondary treatment
Tertiary treatment
None of these

Discuss Question

Answer: Option A. -> Primary treatment
Answer: (a).Primary treatment

Question 126. The Redfield ratio is an index of concentration of

carbon, hydrogen and oxygen
nitrogen, potassium and iron
carbon, nitrogen and phosphorous
carbon, phosphorous and sulfur

Discuss Question

Answer: Option C. -> carbon, nitrogen and phosphorous
Answer: (c).carbon, nitrogen and phosphorous

Question 127. The sulfur pearl of Namibia, Thiomargarita namibiensis

is the worlds largest bacterium
stores high concentrations of nitrate in a huge internal vacuole which takes up 98% of the organisms volume
Both (a) and (b)
is the worlds smallest bacterium

Discuss Question

Answer: Option C. -> Both (a) and (b)
Answer: (c).Both (a) and (b)

Question 128. All of the following species are considered coliforms except