Food Microbiology Questions
Studied by 0 people
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/46
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
47 Terms
A: Poultry, Pork, and Spices
Q: For what foods has irradiation been approved as a preservation method?
A: Mycelium
Q: What is the white colony growth of molds called?
A: Egg, Larva, Pupa, Adult Fly
Q: What are the four main stages in the life cycle of the Drosophila fruit fly?
A: Aspergillus
Q: Which of the following molds has a foot cell: Aspergillus Penicillium, or Alternaria?
A: Positive Values
Q: Molds grow in an oxidation-reduction potential of?…
A: Gas
Q: What does aerogenic bacteria produce?
A: Love Salt
Q: What are Halophilic bacteria?
A: Some oxygen
Q: What do microaerophiles require for growth?
A: To prevent condensation from dripping on the surface of the agar.
Q: Why are plates for total plate count incubated upside down?
A: Psychortrophs, Mesophiles, and Thermophiles
Q: Sporeforming aerobic rods occur as what?
A: Dry Loving
Q: What are Xerophilic molds?
A: Aseptically processed low acid foods.
Q: In what types of foods are thermophilic sporeformers of primary concern?
A: M1
Q: What is the form of aflatoxin excreted in milk?
A: Bacterial spores are more heat resistant than bacterial vegetative cells, yeast cells, and molds.
Q: What is the order of heat resistance for microorganisms?
A: For presence of Salmonella Enteriditis
Q: Why was Schwan's ice cream recalled from the marketplace in October of 1994?
A: Absolute Requirements
Q: What does obligate mean for microorganisms?
A: Salmonella species and Listeria monocytogenes
Q: For what pathogen(s) is/are there a zero tolerance in ready to eat processed foods?
A: Hazard Analysis and Critical Control Points
Q: What does HACCP stand for?
A: Sodium Alginate
Q: Which of the following is not a microbial preservative? (1) Nisin (2) Sodium Propionate, (3) Sodium Alginate, or (4) Nitrite
A: Zearalonone, Trichothecenes, Fumonisins, and Fusarin
Q: Name two mycotoxins produced by Fusarium species.
A: Coliforms are gram-negative, aerobic to falcultatively anerobic, nonsporeforming rods that ferment lactose to gas within 48 hours at 35⁰C.
Q: What are coliforms?
A: Bacillus and Salmonella
Q: Which microorganisms produce endospores?
A: Pseudomonas, Flavobacterium, and Moraxella
Q: What are the dominant spoilage microflora of fish?
A: Poor raw materials, Improper processing techniques, and poor sanitation.
Q: What does high total counts in dehydrated foods indicate?
A: Bacillus stearothermophilus
Q: What bacteria can cause flat sour in foods?
A: 1.Preenrichment 2.Selective Broth Isolation 3.Selective Plate Isolation 4.Biochemical Test 5.Serology
Q: What are the five steps used in the traditional isolation of Salmonella species?
A: Trichinella Spiralis
Q: What food-borne parasite can be found in hogs eating uncooked food waste?
A: When it fails to grow or reproduce in or on media.
Q: When is a microorganism considered dead?
A: Appendages that allow microbes to be motile.
Q: What are flagella?
A: Pseudomonas spp., Flavobacterium spp., Acinetobacter spp., and Moraxella spp.
Q: what are the four most important spoilage microorganisms associated with refrigerated meats?
A: Lactobacillus Viridescens
Q:What causes greening of luncheon type meats?
A: pH 5.3
Q:What is the minimum pH of growth for most Cram-negative aerobic bacteria?
A: .87
Q: What is the minimum water activity for most yeast?
A: Most Probable Number
Q: What does MPN stand for?
A: Water activity= relative humidity/100
Q: How is the relative humidity related to water activity?
A: A microbe that can grow with or without oxygen
Q: What is a facultative anaerobe?
A: A microorganism that grows at 7 degrees Celsius or below (in the refrigerator)
Q: What is a psychrotroph?
A: It is xerophillic.
Q: What property does Aspergillus glaucus have that allows it to grow on dried fruit??
A: Aerobic to facultatively anaerobic Gram-negative, non -sporeforming rods that ferment lactose with the formation of gas within 48 hours at 35C.
Q: What are coliforms?
A: Black
Q: What color are Staphylococcus aureus colonies on Baird Parker agar?
A: To check for the lecithinase reaction
Q: Why is egg yolk used in the media for the isolation of Bacillus cereus?
yeast extract, sodium chloride, sodium glycerolphosphate, maltose, lactose, sodium azide, bromcresol purple, agar, and water?,A: Sodium Azide
Q: What is the selective agent in the following medium: proteose peptone
A: Limulus ameobocyte lysate
Q: What does LAL stand for?
A: Water activity=relative humidity/100
Q: How is the relative humidity related to water activity?
A: A microbe that can grow with or without oxygen.
Q: What is facultative anaerobe?
A: A microorganism that grows at 7 degrees C or below (in the refrigerator)
Q: What is a psychrotroph?
A: A microorganism that grows at 7 degrees C or below (in the refrigerator)
Q: What is a psychrotroph?
Note 
Flashcards (24)