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EXCERCISE 4.3 LAB MICROBIO

front 1

1.What is the purpose of the science of taxonomy?
A) To study bacterial growth
B) To classify and name organisms
C) To measure bacterial motility
D) To identify bacterial spores

back 1

B) To classify and name organisms

front 2

1.Which of the following domains contains organisms with prokaryotic cells?
A) Eukarya
B) Archaea
C) Bacteria
D) Both B and C

back 2

D) Both B and C

front 3

1.In the hierarchical taxonomic system, similar species are placed into the same:
A) Family
B) Order
C) Genus
D) Class

back 3

C) Genus

front 4

1.What distinguishes the bacterial phyla Firmicutes and Actinobacteria?
A) Their cell shape
B) The percentage of Guanine and Cytosine (G + C) bases in their DNA
C) Their ability to form spores
D) Their metabolic pathways

back 4

B) The percentage of Guanine and Cytosine (G + C) bases in their DNA

front 5

1.Which of the following genera is NOT part of the Firmicutes phylum?
A) Bacillus
B) Clostridium
C) Mycobacterium
D) Lactobacillus

back 5

C) Mycobacterium

front 6

1.What is unique about the metabolic strategy of Cyanobacteria?
A) They are Gram-positive
B) They utilize oxygenic photosynthesis
C) They have no cell wall
D) They are obligate anaerobes

back 6

B) They utilize oxygenic photosynthesis

front 7

1.Which genus within the Proteobacteria phylum is known for nitrogen fixation?
A) Escherichia
B) Pseudomonas
C) Rhizobium
D) Salmonella

back 7

C) Rhizobium

front 8

1.What is unique about the cell walls of bacteria in the phylum Chlamydiae?
A) They contain high levels of peptidoglycan
B) They have little or no peptidoglycan
C) They are resistant to all antibiotics
D) They are composed of cellulose

back 8

B) They have little or no peptidoglycan

front 9

1.What materials are needed to study the morphology of key bacterial genera?
A) Only blank notecards
B) Prepared slides, microscopes, and staining materials
C) Only textbooks
D) Only Petri dishes

back 9

B) Prepared slides, microscopes, and staining materials

front 10

1.What should be included on the flashcards for each bacterial phylum?
A) Only the phylum name
B) The phylum name, characteristics, and names of key genera
C) Only the characteristics
D) Only the names of key genera

back 10

B) The phylum name, characteristics, and names of key genera

front 11

1.Which phylum has a Gram-positive reaction and low G + C content in DNA?
A) Actinobacteria
B) Firmicutes
C) Proteobacteria
D) Cyanobacteria

back 11

B) Firmicutes

front 12

1.What is the dominant metabolic strategy of Actinobacteria?
A) Oxygenic photosynthesis
B) Chemoheterotrophy
C) Nitrogen fixation
D) Fermentation

back 12

B) Chemoheterotrophy

front 13

1.Which key genera belong to the Firmicutes phylum?
A) Escherichia, Pseudomonas, Rhizobium
B) Bacillus, Clostridium, Lactobacillus
C) Mycobacterium, Streptomyces
D) Anabaena, Chlamydia

back 13

B) Bacillus, Clostridium, Lactobacillus

front 14

1.What is unique about the cell walls of bacteria in the Chlamydiae phylum?
A) They contain high levels of peptidoglycan
B) They are resistant to all antibiotics
C) They lack peptidoglycan
D) They are composed of cellulose

back 14

C) They lack peptidoglycan

front 15

1.Which phylum includes bacteria that perform oxygenic photosynthesis?
A) Proteobacteria
B) Actinobacteria
C) Cyanobacteria
D) Firmicutes

back 15

C) Cyanobacteria

front 16

1.Which key genus is part of the Actinobacteria phylum?
A) Bacillus
B) Escherichia
C) Mycobacterium
D) Anabaena

back 16

C) Mycobacterium

front 17

1.What is the Gram reaction of Proteobacteria?
A) Positive
B) Negative
C) Variable
D) Neutral

back 17

B) Negative

front 18

1.Which phylum is known for its highly diverse genera?
A) Firmicutes
B) Actinobacteria
C) Proteobacteria
D) Cyanobacteria

back 18

C) Proteobacteria

front 19

1.Which key genus is associated with the Cyanobacteria phylum?
A) Chlamydia
B) Streptococcus
C) Anabaena
D) Spirillum

back 19

C) Anabaena

front 20

1.What is the dominant metabolic strategy of Cyanobacteria?
A) Chemoheterotrophy
B) Oxygenic photosynthesis
C) Fermentation
D) Nitrogen fixation

back 20

B) Oxygenic photosynthesis

front 21

1.Which genus is common in soil and forms endospores?
A) Lactobacillus
B) Bacillus
C) Escherichia
D) Anabaena

back 21

B) Bacillus

front 22

1.Which genus is known for lactic acid production and is important in food production?
A) Clostridium
B) Lactobacillus
C) Staphylococcus
D) Streptococcus

back 22

B) Lactobacillus

front 23

1.Which genus is associated with the human gut and includes both normal microbiota and some human pathogens?
A) Pseudomonas
B) Escherichia
C) Rhizobium
D) Spirillum

back 23

B) Escherichia

front 24

1.Which genus is known for its resistant, waxy cell wall and includes pathogens that cause tuberculosis and leprosy?
A) Streptomyces
B) Mycobacterium
C) Clostridium
D) Chlamydia

back 24

B) Mycobacterium

front 25

1.Which genus is found in root nodules of plants and is involved in nitrogen fixation?
A) Spirillum
B) Anabaena
C) Rhizobium
D) Bacillus

back 25

C) Rhizobium

front 26

1.Which genus is a common toxic food contaminant and obligate anaerobe?
A) Staphylococcus
B) Clostridium
C) Streptococcus
D) Pseudomonas

back 26

B) Clostridium

front 27

1.Which genus is known for filamentous growth and is a source of many antibiotics?
A) Mycobacterium
B) Streptomyces
C) Lactobacillus
D) Salmonella

back 27

B) Streptomyces

front 28

1.Which genus performs oxygenic photosynthesis and nitrogen fixation?
A) Chlamydia
B) Escherichia
C) Anabaena
D) Staphylococcus

back 28

C) Anabaena

front 29

1.Which genus lacks peptidoglycan in its cell walls and includes many human pathogens?
A) Spirillum
B) Bacillus
C) Chlamydia

D) Rhizobium

back 29

C) Chlamydia

front 30

1.Which genus has flagella on both ends and is found in stagnant water?
A) Pseudomonas
B) Salmonella
C) Spirillum
D) Clostridium

back 30

C) Spirillum