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Microbiology > Test 3 > Flashcards

Test 3 Flashcards

0
Q

If 2 have similar rRNA sequences, you can conclude that they

A

Evolved from a common ancestor

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1
Q

Which of the following statements about archae is false?

A

They evolved from bacteria

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2
Q

Which of the following statements about members of the Kingdom Plantae is false?

A

They use organic carbon sources

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3
Q

A bacterial species differs from a species of eukaryotic organisms in that a bacterial species

A

Is a population of cells with similar characteristics

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4
Q

Which of the following is the best evidence for a 3 domain system?

A

Nucleotide sequences in ribosomal RNA vary between all 3 domains

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5
Q

Which of the following statements is a reason for NOT classifying viruses in one of three domains rather than in a fourth domain?

A

Viruses are not composed of cells

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6
Q

In figure 10.1, the closest ancestor for both species “a” and “b” would be which of the following?

A

2

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7
Q

The arrangement of organisms into taxa

A

Shows degrees of relatedness between organisms

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8
Q

Serological testing is based on the fact that

A

Antibodies react specifically with an antigen

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9
Q

Nucleic acid hybridization is based on the fact that

A

Pairing between complementary bases occurs

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10
Q

Which of the following criteria is most useful in determining whether two organisms are related?

A

Both are gram-positive

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11
Q

One of the most popular taxonomic tools is DNA fingerprinting to develop profiles of organisms. These profiles provide direct information about

A

The similarities between nucleotide sequences

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12
Q

Into which group would you place a multicellular heterotroph with chitin cell walls?

A

Fungi

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13
Q

Use the key in table 10.2 to identify a gram negative rod that ferments lactose uses citric acid as its sole carbon source

A

Citrobacter

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14
Q

Which of the following characteristics indicates that two organisms are closely related?

A

Both of their DNA can hybridize

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15
Q

Which of the following are found primarily in the intestines of humans?

A

Facultatively anaerobic gram-negative rods

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16
Q

Which of the following is NOT a characteristic of Neisseria?

A

Requires X and V factors

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17
Q

Staphylococcus and Streptococcus can be easily differentiated in a lab by which one of the following?

A

Growth in high salt concentration

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18
Q

Which of the following do you expect to be MOST resistant to high temperatures?

A

Bacillus subtilis

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19
Q

You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. You can be sure that this bacterium is

A

Using anaerobic respiration

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20
Q

Rickettsias differs from chlamydias in that rickettsias

A

Require an arthropod for transmission

21
Q

E. coli belongs to the

A

Proteobacteria

22
Q 
Which of the following bacteria does NOT belong with the others?
A. Staphylococcus
B. bacillus 
C. Escheria
D. Lactobacillus
E. streptococcus
A

Escheria

23
Q

A primary difference between Cyanobacteria and purple and green phototrophic bacteria is

A

Electron donor for CO2 reduction

24
Q 
Which of the following does NOT belong with the others? 
A. Burkholderia
B. bordetella
C. Pseudomonas
D. Campylobacter
E. salmonella
A

Salmonella

25
Q

Streptomyces differs from Actinomyces because Streptomyces

A

Is a strict aerobe

26
Q

You have isolated a gram-positive rod. What should you do next?

A

Endospore stain

27
Q

Thiobacillus oxidizes inorganic sulfur compounds and reduces CO2. This bacterium is a

A

Chemoheterotroph

28
Q

Which of the following pairs is mismatched?
A. Aerobic helical bacteria - gram negative
B. pseudomonas - gram positive
C. Mycobacteria - acid fast
D. Enterics - gram negative
E. spirochete - axial filament

A

Pseudomonas - gram positive

29
Q

Which one of the following does NOT belong with the others?

A

Staphylococcus

30
Q 
Which of the following is NOT correctly matched?
A. Heterocyst - Cyanobacteria
B. elementary body - escheria
C. Endospore - bacillus 
D. Endospore - clostridium
E. myxospore - gliding bacteria
A

Elementary body - escheria

31
Q

Which of the following statements regarding fungi is FALSE?

A

Most fungi are pathogenic for humans

32
Q

Which of the following statements about helminths is FALSE?

A

They are heterotrophic

33
Q

Which of the following statements about the oomycote algae is FALSE?

A

They have chlorophyll

34
Q

17 patients in 10 hospitals had cutaneous infections caused by Rhizopus. In all 17 patients, Elastoplast bandages were placed over sterile gauze pads to cover wounds. 14 of the patients had surgical wounds two had venous lines insertion sites, and one had a bit wound. Lesions present when when the bandages were removed ranged from vesiculopustular eruptions to ulcerations and skin necrosis requiring debridement. Fungi are more likely than bacteria to contaminate bandage because they

A

Can tolerate low-moisture conditions

35
Q 
Which of the following pairs is mismatched? 
A. Basidiomycota - basidiospores
B. microsporidia - lack mitochondria 
C.  Zygomycota - sporangiophores 
D. Anamorphs - lack spores
E. asomycota - conidiospores
A

Anamorphs - lack spores

36
Q

Which of the following pairs is mismatched?
A. Dermatomycosis - fungal infection on the skin
B. dimorphic fungus - grows as a yeast or a mold
C. Coenocytic hyphae - hyphae with cross-walls
D. Systemic mycosis - fungal infection of body organs
E. teleomorph - produces both sexual and asexual spores

A

Coenocytic hyphae- hyphae with cross walls

37
Q

Which of the following statements regarding Protozoa is FALSE?

A

Nearly all Protozoa cause disease

38
Q

In mid-December….

A

Dimorphic fungus

39
Q

Which of the following tends to be more complex in a parasitic helminth than in free living helminths?

A

Reproductive system

40
Q

Which of the following pairs is mismatched?

  1. Arthroconidium - formed by fragmentation
  2. sporangiospores - formed with hyphae
  3. Conidiospores - formed in a chain
  4. Blastoconidium - formed from a bud
  5. Chlyamydocobnidium - formed in a sac
A

2 and 5

41
Q

Helminthic diseases are usually transmitted to humans by

A

Gastrointestinal route

42
Q

In the malaria parasite life cycle

A

Humans are the intermediate hosts and Mosquitos are both the definitive host and the vector

43
Q

Three weeks after a rafting trip….

A

Humans are the definitive host and crayfish are the intermediate host

44
Q 
Below are paired items referring to the heart worm dirofilaria immitis. Which of the pairs is mismatched? 
A. Dog - definitive host
B. mosquito - vector
C. Dog - sexual reproduction 
D. Mosquito - definitive host
E. none of the pairs are mismatched
A

Mosquito-definitive host

45
Q

A definitive host harbors which stage of a parasite?

A

Adult

46
Q

The life cycle of the fish tapeworm is similar to that of the beef tapeworm. Which of the following is the most effective preventative measures?

A

Cooking fish before eating

47
Q

Which of the following is the most effective control for malaria?

A

Eliminate anopheles

48
Q 
Which of the following pairs is mismatched? 
A. Tick - Lyme disease
B. mosquito - encephalitis
C. Mosquito - pneumocystis
D. Mosquito - malaria
E. tick - Rocky Mountain spotted fever
A

Mosquito - pneumocystis

49
Q

Ringworm is caused by a(n)

A

Fungus

Microbiology (1 decks)

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