Test
Micro Studying
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Preguntas del test (69)
1Unicellular fungi that have a single nucleus and reproduce either asexually by budding and transverse division or sexually by producing spores are called ____________.
- AMolds
- BYeasts
- CFungi
2The cell walls of most fungi contain the polysaccharide chitin.
- AVerdadero
- BFalso
3Molds are fungi with long threadlike filaments called
- ASeptate
- BHyphae
- CSpores
4The mushrooms belong to the division Ascomycota.
- AVerdadero
- BFalso
5Conidiophores are produced during sexual reproduction in some fungi.
- AVerdadero
- BFalso
6The hyphae of the Zygomycota are septate
- AVerdadero
- BFalso
7_____ are an associated between a fungus and a photosynthetic partner
- Afill in the blank
- Bnone
8Mycorrhizae refers to a fungal disease in vascular plants.
- AVerdadero
- BFalso
9The fungi are very important. Why?
- AThey are important decomposers.
- BThey are used in many industrial processes.
- CThey cause diseases in plants and animals.
- DAll of the above.
10Dimorphism refers to a property of some fungi that change from the yeast form to the mold form.
- AVerdadero
- BFalso
11Many viruses have an outer membrane layer called an ________ surrounding the nucleocapsid
- Afill in the blank
- Bnone
12Like bacteria and eukaryotic microorganisms , viruses can be cultured on artificial media.
- AVerdadero
- BFalso
13Bacteriophages are viruses that have the typical prokaryotic appearance of bacteria.
- AVerdadero
- BFalso
14In which of the following ways do viruses differ from living microbial cells?
- AAll of the above are ways in which viruses differ from living microbial cells.
- BViruses have RNA or DNA, but usually not both within the same virion.
- CViruses are obligate intracellular parasites that cannot reproduce independently of host cells
- DViruses are acellular.
15Viral size is usually measured in
- Apicometers
- Bmicrometers
- Cattometers
- Dnanometers
16Viruses can redirect host metabolic functions.
- AVerdadero
- BFalso
17A lytic infection results in the destruction of the host cell.
- AVerdadero
- BFalso
18A prophage replicates
- Aalong with its host as long as the lytic genes are not being expressed
- Bindependent of its host as long as lytic genes are not being expressed
- Calong with its host as long as the lytic genes are being expressed.
- Dindependent of its host as long as the lytic genes are being expressed
19There is no link between viruses and cancer.
- AVerdadero
- BFalso
20Viral proteins and nucleic acids must be assembled before a virus can penetrate a host cell.
- AVerdadero
- BFalso
21Koch's experiments were on Bacillus anthracis, a spore-forming eukaryote.
- AVerdadero
- BFalso
22Koch demonstrated the ability of spores in Bacillis anthracis to cause infection.
- AVerdadero
- BFalso
23Koch demonstrated the ability of spores in Bacillis anthracis to cause infection.
- Awriting scientific papers
- Brelating certain microorganisms with certain diseases.
- Call of these
- Dunderstanding the process of phagocytosis.
- Esterilizing laboratory supplies.
24Which of the following would be consistent with the notion of spontaneous generation?
- AMicroorganisms may be cultivated on solid laboratory media
- BSick people give rise to microorganisms in their body.
- CDisinfection practices are essential to preventing the spread of microorganisms.
- DInsects are important in the transmission of disease.
- EViruses are not types of bacteria.
25Which is improper nomenclature?
- ALactobacillus johnsonni
- BLactobacillus Johnsonni
- CL. johnsonni
26Which of the following developed a set of criteria that could be used to establish a causative link between a particular microorganism and a particular disease?
- APasteur
- Bvon Leeuwenhoek
- CHooke
- DKoch
27Which of the following provided strong evidence against the concept of spontaneous generation?
- AKoch
- Bvon Leeuwenhoek
- CHooke
- DPasteur
28According to the endosymbiosis hypothesis, the organelles in eukaryotic cells are the result of the engulfing of bacteria or cyanobacteria by other prokaryotic cells.
- AVerdadero
- BFalso
29The best technique for examining the presence of a structure with a diameter of 500nm is
- Aelectron microscopy
- Bthe unaided eye
- Clight microscopy
30Why are smears heat-fixed prior to staining?
- Ain order to preserve the internal structures
- Bin order to attach the organism firmly to the slide
- Cin order to kill the organism
- Dall of the above are correct
31Basic dyes are cationic (positively charged) and are commonly used to stain bacteria since the surfaces of these organisms are usually negatively charged.
- AVerdadero
- BFalso
32Since transmission electron microscopy uses electrons rather than light, it is not necessary to stain biological specimens before observation.
- AVerdadero
- BFalso
33The Gram-staining procedure differentiates bacteria based on the chemical composition of which cell structure?
- Acytoplasmic membrane
- Bchromosome
- Ccytoplasm
- Dcell wall
34The primary stain in the Gram Staining procedure is
- AFill in blank
- Bnone
35The counterstain used in the Gram Staining procedure is
- AFill in the blank
- Bnone
36Clostridium botulinum is a spore forming bacterium
- AVerdadero
- BFalso
37Who is credited for the Three Domain Classification of Life?
- APasteur
- BDoolittle
- CWhittaker
- DWoese
38Analysis of 16s rRNA sequences showed that
- Aplants and animals are as distant from bacteria as they are from each other.
- Barchaea are as distant from bacteria as from eukaryotes
- Call microbes are only distantly related to the eukaryotes.
39The first living organisms on earth likely were most similar to which of the following groups of present-day organisms?
- AAlgae
- BProtozoa
- CCyanobacteria
- DArchaea
40“Universal chronometer” refers to all of the following except:
- ASmall subunit ribosomal RNA (ribonucleic acid
- BThe universal ancestor.
- CSequence changes slowly with time, permitting detection of relatedness among very distant species
- DThroughout time, proven to be necessary for cells to survive.
- EBroadly distributed
41Whittaker's 5 kingdom classification gives a great deal of attention to the prokaryotes.
- AVerdadero
- BFalso
42The terms prokaryote and eukaryote refer primarily to the presence of a cellular
- Anucleus
- Bmembrane
- Cgranule
- Dwall
- Espore
43Which of the following organisms is not a sporeformer:
- AE. coli
- BC. botulinum
- CB. anthracis
44All the following can be components of the bacterial cytoplasm except
- Amagnetosome
- Bplasmid
- Cgranule
- Dpeptidoglycan
- Eribosome
45Which term best matches this phrase:
Rigid filament that permits motility- Aglycocalyx
- Bendospore
- Cflagellum
- Dpilus
46Which term best matches this phrase:
Aids transfer of genetic material between bacteria- AEndospore
- Bflagellum
- Cpilus
- Dglycocalyx
47There are no bacteria that can perform photosynthesis
- AVerdadero
- BFalso
48Cyanobacteria carry out nitrogen fixation in specialized cells called heterocysts.
- AVerdadero
- BFalso
49The glycocalyx is a protective layer.
- AVerdadero
- BFalso
50Motile bacteria can respond to chemical and physical gradients in their environment.
- AVerdadero
- BFalso
51Gas vesicles are small gas-filled structures made of protein that confer ___________ on cells
- AFill in the blank
- Bnone
52Algae are primarily aquatic microorganisms.
- AVerdadero
- BFalso
53Rhodophyta are the red algae.
- AVerdadero
- BFalso
54In the oceans, ________ refers to the microorganisms suspended in the aqueous environment.
- Azooplankton
- BPlankton
55The pyrenoid concentrates carbon monoxide for photosynthesis.
- AVerdadero
- BFalso
56Zooplankton are the small photosynthetic protists that are animal like.
- AVerdadero
- BFalso
57The conversion of CO2 to biomass is called_________.
- ACarbon fixation
- BNitrogen fixation
58There are no algae that can be in symbiotic relationships with other organisms or microorganisms.
- AVerdadero
- BFalso
59The algae have mitochondria for photosynthesis.
- AVerdadero
- BFalso
60"Protozoa" is the plural form of "Protist."
- AVerdadero
- BFalso
61The dormant form of a protozoan is called a ___________
- AFill in the blank
- Bnone
62Which of the following is a method of locomotion used by protozoa?
- APseudopodia
- BFlagella
- CAll of the above
- DCilia
63Protozoa do not exhibit sexual reproduction.
- AVerdadero
- BFalso
64Protozoa are always unicellular.
- AVerdadero
- BFalso
65Trypanosoma species cause Malaria.
- AVerdadero
- BFalso
66All protozoa require oxygen.
- AVerdadero
- BFalso
67Foraminifera are amoebae that secrete a shell during vegetative growth.
- AVerdadero
- BFalso
68Dinoflagellates are unicellular protozoa that cause red tides.
- AVerdadero
- BFalso
69Euglena can grow both autotrophically and heterotrophically.
- AVerdadero
- BFalso
Información
- Descripción
- Science Test sobre Micro Studying, creado por roy chan el 30/09/2021.
- Autor
- roy chan
- Idioma
- English
- Visitas
- 14
- Etiquetas
- Valoración
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