Principles of Micro

Question 1

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

Answer 1

3

lower respiratory infection, diarrheal diseases, and HIV/AIDS

Question 2

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

Answer 2

5

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

Question 3

positive aspects of microbes

Answer 3

recycling
extreme environments
primary productivity

Question 4

three basic groupings of microbes

Answer 4

prokaryotes, eukaryotes, and viruses

Question 5

example of prokaryotes and which causes disease

Answer 5

bacteria - Yes

Archeae - NO

Question 6

examples of eukaryotes and which causes disease

Answer 6

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

Question 7

do viruses cause disease

Answer 7

yes

Question 8

which habitats have the greatest percentage of microorganisms

Answer 8

marine subsurface with 66%

and terrestrial subsurface with 26%

Question 9

what percentage of microorganisms are in humans

Answer 9

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

Question 10

what properties shared by all cells

Answer 10

metabolism, growth/reproduction, evolution

Question 11

what properties are shared by some cells

Answer 11

motility, differentiation, and communication

Question 12

what are the three domains of life

Answer 12

bacteria, archeae, and eukaryotes

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

Question 13

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

Answer 13

they are not alive

Question 14

how are the three domains chosen/classified

Answer 14

based on 16S ribosomal RNA

Question 15

difference between pure culture and mixed culture

Answer 15

pure - millions of one type of cells

mixed - two or more type of cells

Question 16

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

Answer 16

it is a family name

Question 17

what is a virus species

Answer 17

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

Question 18

what is meant by polythetic class

Answer 18

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

Question 19

order microbes in order of decreasing size

Answer 19

Algae and Protozoa, Fungi, Bacteria, Virus

Question 20

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

Answer 20

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

Question 21

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

Answer 21

unicellular (prokaryotes)
reproduce asexually
μm
utilize or synthesize nutrients

Question 22

are bacteria motile

Answer 22

some are and some are not

Question 23

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

Answer 23

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

Question 24

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

Answer 24

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

Question 25

are algae motile

Answer 25

some are

Question 26

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

Answer 26

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

Question 27

what does it mean to be heterotrophic and which microbes are

Answer 27

get energy source from organic substances

protozoa and fungi and bacteria

Question 28

are protozoa motile

Answer 28

many are