L5.1 Proteobacteria_Alphaproteobacteria

Question 1

stands out for its
vast diversity in habitat, metabolism, and
lifestyle, being the largest bacterial
phylum

Answer 1

Proteobacteria

Question 2

What are the metabolic strategies of proteobacteria?

Answer 2

Photosynthesis
Chemo-heterotrophy
Nitrogen fixation

Question 3

What are the classes under proteobacteria?

Answer 3

Alpha
Beta
Gamma
Delta
Epsilon
Zeta

Question 4

the most dominant
in the oligotrophic proteobacteria.

Answer 4

Alphaproteobacteria

Question 5

Unusual metabolic modes of a-proteobacteria

Answer 5

Methylotrophy
Chemolithotrophy
Ability to fix nitrogen

Question 6

Methylotrophy

Answer 6

grow using methane (methylobacterium)

Question 7

Chemolithotrophy

Answer 7

electron sources from inorganic compounds (nitrobacter)

Question 8

Nitrogen fixer example

Answer 8

Rhizobium

Question 9

What are the orders under Alphaproteobacteria

Answer 9

Rhizobiales
Rickettsiales

Question 10

What are the genera under Rhizobiales

Answer 10

Bartonella, Methylobacterium
Pelagibacter
Rhizobium
Agrobacterium

Question 11

Majority of the a-proteobacteria are under what order?

Answer 11

Rhizobiales

Question 12

Describe the order rhizobiales

Answer 12

phototrophs, chemolithotrophs, symbionts, nitrogen-fixing bacteria

Question 13

a polyphyletic collection of genera, form root nodules and fix
nitrogen in symbiotic association with
leguminous plants

Answer 13

Rhizobia

Question 14

Genus under Rhizobiales

Answer 14

Rhizobium
Agrobacterium
Methylobacterium
Bartonella
Pelagibacter

Question 15

Rhizobium

Answer 15

Forms root nodules and fixes nitrogen with leguminous plants

Question 16

Agrobacterium

Answer 16

Crown gall disease, pathogenic

Question 17

Methylobacterium

Answer 17

Capable of using methane as carbon source, and can be cultivated in vitro with methanol

Question 18

Bartonella

Answer 18

Causes trench fever, cat scratch diseases

arthopod vectors, fastidious

Question 19

species under Bartonella

Answer 19

quintana, henselae, bacilliformis

Question 20

Pelagibacter

Answer 20

photic zone of ocean
oligotroph, obligate aerobic, chemoorganotroph

Question 21

Describe the order rickettsiales

Answer 21

-intracellular parasites and mutualist with arthropods

Question 22

How do you cultivate rickettsiales?

Answer 22

cultivated on host cells such as chicken or tissue culture since they are intracellular

Question 23

Describe Rickettsia

Answer 23

-cause typhus, Rocky mountain spotted fever

Question 24

vectors of rickettsia diseases

Answer 24

arthropod diseases such as ticks, fleas, lice and mites

Question 25

metabolic profile of rickettsiales

Answer 25

• oxidize amino acids, host-reliant for metabolites

Question 26

How are viruses similar to rickettsia?

Answer 26

replicate in the cytoplasm of the host cell and lyse to proliferate but they do not use the host’s ribosomes and nutrients since they have their own

Question 27

Transmission cycle of Rickettsia

Answer 27

tick-human-arthropod

Question 28

What are wolabachia

Answer 28

-intracellular parasites of arthropods

Question 29

Effect of wolabachia in their hosts

Answer 29

induces pathenogenesis, male killing and feminization.

Question 30

species of wolbachia that colonizes the insect eggs

Answer 30

Wolbachia pipientis

Question 31

How Wolbachia affects mosquitoes

Answer 31

female mosquitoes with wolbachia cannot transmit dengue.

Question 32

Application of wolbachia

Answer 32

biocontrol for dengue in disease vector control