2000
Microbiology
1


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Questionario a risposta multipla
1- Monosaccharides are:
hydrocarbons
flattyids
derivatives of glycerol
carbohydrates
2- Which of the following substances performs the function of coenzyme?
Amino acid
Vitamin
Hormone
Disaccharide
3- What is the best method of preserving the microbial cultures?
Freeze-drying (lyophilization)
Refrigeration (cooling)
Deep-freezing
Freezing
4- What is the organic compound most used in oxidation during the respiratory process?
A phosphate
A carbohydrate
A lipid
A protein
5- The percentage of the average composition of biogas is:
50-70% of methane and 35-45% of carbon dioxide
30-40% of methane and 60-65% of carbon dioxide
80-90% of methane and 10-20% of carbon dioxide
10-20% of methane and 80-90% of carbon dioxide
6- Which of the following microrganisms are characterized by the absence of a membrane around their nucleus?
Algae
Moulds
Bacteria
Protozoa
7- Potable water is:
Rich in fecal coliforms.
The product of a secondary sewage treatment plant.
Water rich in viruses.
Water that is fit to drink (safely).
8- "The coliform count of water reflects the chance of pathogens being present: the lower the coliform count, the less likely it is that pathogens are in the water." What does this statement mean?
The probability of the presence of pathogens in the water is directly proportional to the coliform count.
The presence of coliforms in the water suggests the absolutely sure presence of pathogens.
If the coliform count is low, it can be assumed that the water is free of pathogens.
The coliform count is inversely proportional to the probability of the presence of pathogens in the water.
9- Water containing coliforms...
always contains pathogens
can contain pathogens
never contains pathogens
surely contains pathogens
10- Which of the following microorganisms are characterized by the presence of a membrane around the nucleus:
Algae, fungi, moulds and protozoa.
Algae, fungi, moulds and bacteria.
Algae, fungi, protozoa and bacteria.
Algae, moulds, protozoa and bacteria
11- Which bacterial genus should be absent in potable water?
Bacillus
Escheridia
Pseudomonas
Azotobacter
12- What does a high rate of BOD and COD reveal?
The presence of a high microbial charge
The presence of chemical pollutants
The presence of a high concentration of organic substances
The presence of a low content of salts
13- Yogurt is rich in:
palatable microorganisms
unpleasant microorganisms
moulds
inorganic acids
14- What organic compound is mostly employed in the oxidation during the respiratory process?
A phosphate
A carbohydrate
A lipid
A protein
15- Water production is obtained in the:
alcoholic fermentation
anaerobic respiration
aerobic respiration
lactic fementation
16- What does one obtain from the alcoholic fermentation?
36 molecules of ATP
38 molecule of ATP
2 molecules of ATP
4 molecules of ATP
17- What is the percentage of milk fat in butter?
80% to 85%
12% to 16%
55% to 60%
25% to 50%
18- Why isn't milk considered "the perfect food"?
Because it lacks iron
Because it lacks calcium
Because it lacks phosphorous
Because it lacks vitamin A
19- Lactose is a carbohydrate present:
in all foods of animal origin
only in some foods
in eggs
in pasteurized milk
20- What does the presence of Staphylococcus aureus in (fresh cow's) milk reveal?
Poor environmental hygiene
The cow's disease
Aerial pollution
Contamination of feeds



© Nino Vessella , 1996-.
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