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Microbiology BIOL 2231 hybrid Lab quiz 2 Flashcards | StudBud
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Microbiology BIOL 2231 hybrid Lab quiz 2
Microbiology BIOL 2231 hybrid Lab quiz 2
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Lab quiz 2 , Fall 2023
Flashcards
50 cards
F
Practice quiz
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Host live
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Questions
50
Answers
1
Most serious human Streptococci infections are -- hemolytic with most virulent categorized in the Lancefield Group---
alpha and B
beta and A
beta and B
beta and C
2
Bacteria have few shapes and staining characteristics.
False
True
3
The plate below is a test for _______
lactase
carbohydrate
gram positive bacteria
lipid
4
In starch reaction a clearing around the bacterial growth indicates that the organism has hydrolyzed starch.
False
True
5
Evaluate the streak plate of bacterial growth
Two different bacteria were inoculated
The bacteria are not spread out enough to select individual colonies.
Streaking is done properly
It appears that it was incubated incorrectly.
6
The following plate shows that
streaking has done properly
Two bacterial species are growing very well
none of these
a single colony of bacteria has grown on the plate
7
Milk agar is used to test the enzyme catlase
False
True
8
The urease test is used to detect Gram negative Enterics bacteria
False
True
9
In Kirby-Bauer antibiotic testing the zone sizes are looked up on a standardized chart to give a result of....
Inhibited, Standardized, or Restricted.
Inhibited, Resistant, or Suspicious.
Susceptability, Resistant, or Intermediate.
Suppressed, Inhibited, or Reversed.
10
The test tube displayed below exhibits a _________ result for gas and a __________ result for acid production.
positive, positive
negative, negative
positive, negative
negative, positive
11
Which of the following can be compared to "fingerprints as used for humans"?
metabolic characteristics
aerobe and anaerobe
anabolic characteristics
Gram negative and gram positive
12
Enterics are urease positive
True
False
13
The metabolic characteristics of bacteria are determined by:
observing increased cell formation
observing substrate utilization
all of these
observing product formation
14
If organism produces urease enzyme, the color of the slant changes from yellow to bright pink
True
False
15
MSA is used to test for Staphylococcus aureus
False
True
16
The following plate show positive reaction for DNAse
True
False
17
In SIM tubes In SIM tubes H2S react with Iron in the medium to form iron sulfide (gives black color)
True
False
18
Starch agar is used to test the production of amaylase
True
False
19
Whacan you deduce by looking at this plate
Only yellow bacteria are able to grow
bacteria fermenting mannitol
bacteria are fermenting sugar
Bacteria are growing
20
Nutrient agar is used to test the enzyme catalase
True
False
21
If the bacteria growing on SIM media produced desulfurase the media will appear this color?
black
blue
Fuchsia
Green
22
The following mediaum is used to test the presence of Staphylococcus
Mannitol Salt Agar
McCkonky agar
EMB
enriched growth medium
23
Iodine turns ------(depending on the concentration of iodine) in the presence of starch.
black
blue
all of these
purple
24
Durham tube is place to
to collect acid
trap gas
trap bacteria
trap oxygen
25
In urease test ----- produced that changes color of medium from ----
acid, pink to yellow
ammonia, yellow to bright pink
ammonia, yellow to black
H2S, yelowish to black
26
Metabolic characteristics of bacteria is not observed by substrate utilization
False
True
27
IN SIM "M" is not a biochemical test
False
True
28
Enzymes produced by some bacteria can hydrolyze the amino acid tryptophan forming
lactose
glucose
indole
iodine
29
The organism growing on this medium is
endospores
acid fast bacteria
Gram negative bacteria
Gram positive bacteria
30
Production of acid by --------- changes the pH of medium that changes the --- to yellow
Bacillus, sugars
Streptococcus, lactose
Staphylococcus aureus, phenol red
Staphylococcus, medium
31
The following plate is showing positive for lipid
False
True
32
Lack of yellow color development is indicative of a negative carbohydrate fermentation reaction
True
False
33
SIM is used to test desulfurase
True
False
34
Milk agar is used to test the presence of enzyme caseinase
True
False
35
Gram positive bacteria will not gow on MSA medium
False
True
36
The test tube contain a small test tube called Durham tube
True
False
37
E. coli ferments sugar lactose
False
True
38
Enterics are Gram negative bacteria
True
False
39
Which one of the following is not an enzyme
catalase
Tryptophanase
pepsin and trypsin
hydrogen sulfide
40
The following organisms will give positive reaction to DNAse reaction test
all of these
Serratia marcescens
Staphylococcus aureus
Bacillus and Staphylococcus aureus
41
This is ----------plate
Nutrient Agar
EMB
MSA
SIM
42
The development of a yellow color in the medium is indicative of a positive carbohydrate fermentation reaction
True
False
43
The following bacteria are positive for glucose fermentation
Citrobacter, Enterobacter
E. coli
E. coli, Staphylococcus, Citrobacter, Enterobacter
E. coli, Staphylococcus
44
1. The ability of bacteria to utilize certain foods or produce various products is primarily the result of?
all of these
Enzyme production
pH
Temperature and pH
45
Most of of the isolates belonging to the genera Bacillus contain
cellulase
DNAse
carboxylase
terminase
46
Phenol red is added in the medium as a
inhibitor of Gram positive bacteria
none of these
Inhibitor of Gram negative bacteria
pH indicator
47
Proteus and Helicobacter are important urease-positive bacteria
False
True
48
The reagent used to show DNA digestion by bacteria is:
hydrochloric acid (HCl)
RNAse
iodine
Kovacs reagent
49
The ability of bacteria to utilize certain foods or produce various products is primarily the result of?
reproductive methods
gram staining reaction
specific enzyme activity
shape and staining characteristics
50
DNAse is
an enzyme
a nucleitide
a type of DNA
lipoprotein
