Microbiology Lab Exam #2
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- 1.An enzyme that breaks down starch into smaller units
- A.
Decarboxylase
- B.
Amalyse
- C.
Lipase
- D.
Proteinase
- 2.Caseinase (proteinase) breaks down
- A.
Gelatin
- B.
Starch
- C.
Fats
- D.
Milk protein
- 3.In the carbohydrate tests phenolred broth base was used with the appropriate carb if the indicator turned yellow
- A.
Gas is produced
- B.
Acid is produced
- C.
Base is produced
- D.
Reduction has taken place
- 4.An enzyme breaks down fat into smaller units is
- A.
Lipase
- B.
Decarbxylase
- C.
Amylase
- D.
Proteinase
- 5.The following equation indicate the enzyme which facilitate the reaction2H2 O2-----------------> 2H2O + O2hydrogen peroxide water free oxygen
- A.
Protease
- B.
Lipase
- C.
Catalase
- D.
Urease
- 6.Trypanosoma gambiense belongs to class
- A.
Sacodina
- B.
Mastigophora
- C.
Probobozoan
- 7.Medium best suitable for the cultivation of a wide variety of fungal types would be
- A.
Sab- Dex
- B.
TSA
- C.
TSE
- D.
EMB
- 8.Fungi best grow at
- A.
37
- B.
20- 25
- C.
40
- D.
4
- 9.Common black bread mold is
- A.
Penicillin
- B.
Mucor
- C.
Rhizopus
- D.
Aspergillus
- 10.Which of the following stages of malarial parasite are found in mosquito?
- A.
Merozoite
- B.
Sporoite
- C.
Ringworm
- D.
Mature trophozoite
- 11.Which media is most suitable for detecting H2S production?
- A.
TSA
- B.
EMB
- C.
SIM
- D.
Sab- Dex
- 12.In the nitrate reduction test a negative test for nitrite indicates
- A.
The nitrite is present
- B.
Nitrate has remained unchanged
- C.
Nitrite has been converted to ammonia and free nitrogen
- D.
All of the above
- 13.The catalase test is particularly useful in distinguishing
- A.
Bacillus & clostridium
- B.
Salmonella & shiaella
- C.
Streptococaceae & staphylococci
- D.
Serratia & pseudomonas
- 14.Oxidase test aids in differentiation among membrane of the following genera
- A.
Pseudomonas
- B.
Neisseria
- C.
Salmonella
- D.
A & b
- 15.African sleeping sickness is cause by
- A.
Bacterium
- B.
Fungus
- C.
Algae
- D.
Protozoan
- 16.Which of the following are not closely related?
- A.
Amoebic dysentery
- B.
African sleeping sickness
- C.
Giardiassis
- D.
Dengue fever
- 17.Measurement of antibiotic resistance is done by measuring the diameter around a disc is called
- A.
Zone of alpha hemolysis
- B.
Zone of beta hemolysis
- C.
Zone of inhibition
- D.
Zone of gamma hemolysis
- 18.When using a disinfectant or antiseptic its best to keep in mind that the efficiency influenced by several factors including
- A.
Concentration
- B.
Length of exposure
- C.
Environmental conditions
- D.
All of the above
- 19.Normal flora of the mouth or throat would include all BUT one of the following
- A.
Myobacterium tuberculosis
- B.
Streptococcus mutants
- C.
Lactobacillus acidphilus
- D.
Neisseria sap
- 20.Which of the following conditions is not associated with staphylococcus aureus
- A.
Boils
- B.
Carbuncles
- C.
Impetigo
- D.
Valley fever
- 21.Which of the following test would best distinguish between staphylococcus aureus and staphylococcus epidermis?
- A.
Catalase test
- B.
Imvic series
- C.
Nitrate reduction
- D.
Coagulase test
- 22.Which test will most effectively separate the hemolytic group a streptococci aureus from group b through n
- A.
Bactitracin
- B.
Camp test
- C.
Bile esculin test
- D.
6.5 nacl medium
- E.
All of the above
- 23.Beta hemolysis of red blood cells is
- A.
Partial
- B.
Complete
- C.
Associated & pathogen-city
- D.
A & c
- 24.Which of the following media is most suitable for the cultivation of gram positive cocci
- A.
Mcconkeys
- B.
Blood or rose agar
- C.
Sab-dex agar
- D.
A & b
- 25.All of the following cause a form of dysentery: entamoeba histolyca, balantidivm coli, giardia lambdia and trypanosoma gambiense
- A.
True
- B.
False
- 26.Merozoites form in the liver and erythrocytes of humans infected with malaria
- A.
True
- B.
False
- 27.In the malarial parasite the process of fertilization takes place in the lumen of the mosquitos gut
- A.
True
- B.
False
- 28.The chills and fever symptoms of malaria are associated with the release of humerous merozoites into the bloodstream
- A.
True
- B.
False
- 29.The definitive host in the malarial parasite life cycle is man
- A.
True
- B.
False
- 30.The nutrients used by bacteria are determined by their genetics and the enzymes they can produce
- A.
True
- B.
False
- 31.The term substrate can be defined as the molecule that an enzyme is able to act on
- A.
True
- B.
False
- 32.The red color always indicates a positive test for nitrate when the correct reagents are added
- A.
True
- B.
False
- 33.The IMVic series is a sense of tests used to identify enteric bacilli
- A.
True
- B.
False
- 34.Proteolysis means digestion of protein
- A.
True
- B.
False
- 35.A positive test for H2S production in the most media is manifested as a cerise or magenta colored precipitate
- A.
True
- B.
False
- 36.If a lactose non-fermenting gram-negative rod produces a positive test for urea hydrolysis it is most probably the genus proteus
- A.
True
- B.
False
- 37.TSI agar and SIM medium are used solely to detect H2S production
- A.
True
- B.
False
- 38.Barritts reagent is added to a culture to test for the presence of acetyl methyl carbinol
- A.
True
- B.
False
- 39.A color change of inoculated simmons citrate agar from green to blue constitutes a positive test for citrate utilization
- A.
True
- B.
False
- 40.Enrichment media contain nutrients that greatly encourage the growth of some organisms
- A.
True
- B.
False
- 41.Some media such as mannitol salt agar can be both selective and differential
- A.
True
- B.
False
- 42.Intestinal pathogens in the family enterobacteriaceae are gram positive rods
- A.
True
- B.
False
- 43.Coagulase is an enzyme produced by staphylococcus epidermis
- A.
True
- B.
False
- 44.Staphylococcus aureus will ferment mannitol
- A.
True
- B.
False
- 45.When e coli acts as a pathogen it is most often in the respiratory tract
- A.
True
- B.
False
- 46.Entamobea histolytica is a true fungus that causes dysentery
- A.
True
- B.
False
- 47.The catalase test differentiates gram-negative rods
- A.
True
- B.
False
- 48.Oxidase enzyme plays a vital role in the electron transport system during aerobic respiration
- A.
True
- B.
False
- 49.Lactose fermentation is very useful in the identification of gram-negative rods
- A.
True
- B.
False
- 50.Staphylococcus epidermis is gram negative pathogen
- A.
True
- B.
False
- 51.Neisseria sp can be found in the throat and upper respiratory tract
- A.
True
- B.
False
- 52.Lipases, proteases, and amalyses are examples of intracellular enzymes
- A.
True
- B.
False
- 53.Ureases, catalases, and oxidases are extra-cellular enzymes
- A.
True
- B.
False
- 54.What is the slide?
- A.
Crytosporidium
- B.
Plasmodium
- C.
Aspergillis
- 55.Select the ones you like
- A.
Rhizopus
- B.
Entamoeba
- C.
Balantidium
- 56.Select the ones you like
- A.
Trypanosoma
- B.
Penicillium
- C.
Plasmodium
- 57.Select the ones you like
- A.
Trypanosoma
- B.
Aspergillus
- C.
Crytospordium
- 58.Select the ones you like
- A.
Ring stage
- B.
Balantidium
- C.
Rhizopus
- 59.Select the ones you like
- A.
Balantidium
- B.
Trypanosoma
- C.
Entamoeba
- 60.Select the ones you like
- A.
Penicillium
- B.
Rhizopus
- C.
Plasmodium
- 61.Select the ones you like
- A.
Aspergillus
- B.
Balantidium
- C.
Ring stage
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