Question 1

Which of the following is CORRECT about the prokaryotes known as deeply branching bacteria?

Accepted Answer

A)   They are chemoheterotrophs.
B)   They lack peptidoglycan walls.
C)   They are commonly found in acidic, anaerobic conditions.
D)   They grow in long branching filaments.
E)   They are photosynthetic. C

Question 2

Which of the following bacterial arrangements is the result of snapping division?

Accepted Answer

A)   tetrads
B)   palisades
C)   strepto-
D)   sarcinae
E)   staphylo- B

Question 3

The classification of prokaryotes in Bergey's Manual of Systematic Bacteriology is largely based on

Accepted Answer

A)   Gram stain reaction.
B)   habitat.
C)   type of electron receptor used in cellular respiration.
D)   rRNA sequences.
E)   cellular morphology. D

Question 4

Which of the following groups of bacteria is named for its resemblance to fungi?

Accepted Answer

A)   Corynebacterium
B)   Actinomyces
C)   Clostridium
D)   Lactobacillus
E)   Staphylococcus

Question 5

The process by which a bacterial cell produces an endospore is called (endosporing/sporulation/vegetation).

Accepted Answer

The answer of The process by which a bacterial cell...

Question 6

The infective stage of chlamydia is called the (elementary/endospore/initial)body.

Accepted Answer

The answer of The infective stage of chlamydia is called...

Question 7

Pseudomonas species are occasional causes of

Accepted Answer

A)   diarrheal disease.
B)   food poisoning from rice.
C)   food poisoning from dairy products.
D)   "flesh-eating" bacterial infections.
E)   urinary tract infections.

Question 8

Aerobic cyanobacteria carry out the reactions of nitrogen fixation in

Accepted Answer

A)   akinetes.
B)   endospores.
C)   heterocysts.
D)   chloroplasts.
E)   lamellae.

Question 9

Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?

Accepted Answer

A)   Staphylococcus
B)   Listeria
C)   Lactobacillus
D)   Mycobacterium
E)   Corynebacterium

Question 10

Halophiles grow equally well in the presence or absence of high salt concentrations.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following bacteria oxidize nitrite (NO2-)to produce nitrate (NO3-)?

Accepted Answer

A)   Nitrobacter
B)   Azospirillum
C)   Nocardia
D)   Cyanobacter
E)   Rhizobium

Question 12

Gram-negative nitrogen-fixing bacteria found in association with plant roots are

Accepted Answer

A)   alphaproteobacteria.
B)   betaproteobacteria.
C)   cyanobacteria.
D)   gammaproteobacteria.
E)   deeply branching bacteria.

Question 13

The rod-shaped (chlamydias/brucella/rickettsias)are intracellular parasitic members of the alphaproteobacteria.

Accepted Answer

The answer of The rod-shaped (chlamydias/brucella/rickettsias)are intracellular parasitic members of...

Question 14

The plant pathogen ________ is a member of the alphaproteobacteria that alters plant cells by introducing DNA into them.

Accepted Answer

A)   Azotobacter
B)   Agrobacterium
C)   Rhizobium
D)   Pseudomonas
E)   Bdellovibrio

Question 15

Burkholderia is a common (true/opportunistic)pathogen of patients with cystic fibrosis.

Accepted Answer

The answer of Burkholderia is a common (true/opportunistic)pathogen of patients...

Question 16

What feature of mycobacteria is responsible for the unusually slow growth of these bacteria?

Accepted Answer

A)   Their low tolerance for oxygen retards their growth.
B)   They cannot fully metabolize carbohydrates and must rely on fermentation.
C)   They have limited numbers of ribosomes so protein production is slow.
D)   The mycolic acid in their cell walls requires signification metabolic investment.
E)   They lack a cell wall and are extremely fragile.

Question 17

Which of the following characteristics distinguish the archaea from the bacteria?

Accepted Answer

A)   cell wall composition
B)   ribosomal RNA (rRN
C)   the deoxyribonucleotides in the DNA
D)   cytoplasmic membrane lipids
E)   cell wall composition, cytoplasmic membrane lipids, and rRNA sequences

Question 18

Which of the following statements regarding mycoplasmas is FALSE?

Accepted Answer

A)   They are low G + C content bacteria.
B)   They stain Gram positive.
C)   They are pleomorphic.
D)   They exhibit a "fried egg" appearance on solid media.
E)   They are the smallest free-living cells.

Question 19

The majority of prokaryotes are capable of forming endospores.

Accepted Answer