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Flashcards in Principles of Micro Deck (28)
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1

how many of the top ten leading causes of death in the world are microbial and what are they?

3

lower respiratory infection, diarrheal diseases, and HIV/AIDS

2

how many of the top ten leading causes of death in low income countries are microbial and what are they?

5

lower respiratory infections, HIV/AIDS, diarrheal diseases, malaria, and tuberculosis

3

positive aspects of microbes

recycling
extreme environments
primary productivity

4

three basic groupings of microbes

prokaryotes, eukaryotes, and viruses

5

example of prokaryotes and which causes disease

bacteria - Yes
Archeae - NO

6

examples of eukaryotes and which causes disease

Protozoa - Yes
Fungi - sometimes in those with improperly functioning immune system
Algae - rarely

7

do viruses cause disease

yes

8

which habitats have the greatest percentage of microorganisms

marine subsurface with 66%
and terrestrial subsurface with 26%

9

what percentage of microorganisms are in humans

1% but this percentage includes other habitats like animals, freshwater etc

10

what properties shared by all cells

metabolism, growth/reproduction, evolution

11

what properties are shared by some cells

motility, differentiation, and communication

12

what are the three domains of life

bacteria, archeae, and eukaryotes

bacteria and archeae are prokaryotes so they do not have a nucleus

13

why aren't viruses one of the classifications of domains of life

they are not alive

14

how are the three domains chosen/classified

based on 16S ribosomal RNA

15

difference between pure culture and mixed culture

pure - millions of one type of cells
mixed - two or more type of cells

16

if the nomenclature ends with eae, what type is it most likely

it is a family name

17

what is a virus species

polythetic class of viruses that constitute a replicating lineage and occupy a particular ecological niche

18

what is meant by polythetic class

members have several properties in common although they do not all necessarily have a single defining property

19

order microbes in order of decreasing size

Algae and Protozoa, Fungi, Bacteria, Virus

20

Virus: what type of cell, how do they reproduce, size,

acellular - they depend on living cells
they do not replicate/grow
usually nm (sometimes larger)

21

bacteria: type of cell, how do they reproduce, size, what they do with nutrients

unicellular (prokaryotes)
reproduce asexually
μm
utilize or synthesize nutrients

22

are bacteria motile

some are and some are not

23

fungi: type of cell, how do they reproduce, size, how do they get nutrients

uni or multi cellular
reproduce asexually or sexually depending on fungi
μm to cm
they get nutrients from dead or decaying material

24

algae: type of cell, how do they reproduce, size, how do they get nutrients

uni or multicellular
reproduce sexually or asexually
μm to feet
photosynthesis for energy (sunlight)

25

are algae motile

some are

26

protozoa: type of cell, how do they reproduce, size, how do they get nutrients, where are they found

unicellular
reproduce asexually or sexually
μm to cm
heterotrophic
found in aquatic and terrestrial environment

27

what does it mean to be heterotrophic and which microbes are

get energy source from organic substances

protozoa and fungi and bacteria

28

are protozoa motile

many are