Quiz of chemical preservation

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quiz
pedangpena007
Quiz by pedangpena007, updated more than 1 year ago
pedangpena007
Created by pedangpena007 almost 9 years ago
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Resource summary

Question 1

Question
Before we learn about food preservatives, we have to know that all microorganisms are harmful in foods.
Answer
  • True
  • False

Question 2

Question
Food that has a high pH value give a greater effect in sulfur dioxide against the molds compared with low pH.
Answer
  • True
  • False

Question 3

Question
When we add sorbates at maximum value which is 0.2%, the taste of foods may change.
Answer
  • True
  • False

Question 4

Question
Examples of Parabens are tomato sauce, soft drinks and salad dressings.
Answer
  • True
  • False

Question 5

Question
Is it safe to use chemicals for food preservation that are not listed as GRAS by FDA regulations?
Answer
  • True
  • False

Question 6

Question
Preserve foods by using salt and sugar works by
Answer
  • lowering osmotic pressure
  • creating a hypertonic environment.
  • creating a hypotonic environment.
  • raising pH

Question 7

Question
Nitrite prevents the growth of:
Answer
  • Pseudomonas aeruginosa
  • Clostridium botulinum
  • Escherichia coli
  • ‎Salmonella

Question 8

Question
Vitamin C and vitamin E, BHA and BHT, and sulfites are all
Answer
  • antimicrobial agents
  • flavor enhancers
  • incidental food additives
  • antioxidants.

Question 9

Question
The effectiveness of many chemical preservatives depends primarily on the food
Answer
  • water content.
  • temperature.
  • pH.
  • All of the above.

Question 10

Question
Potassium sorbate is responsible for
Answer
  • stabilize red color of meat
  • block the oxidation of glucose and pyruvate at the acetate level
  • prevent gassy spoilage
  • weakening of transmembrane gradient
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