Chapter 18 Microbiology - bacterial diversity

Photoheterotrophs absorb light for energy but do not typically

fix carbon dioxide

the firmicutes _________ are the only known phototrophs that produce endospores

heliobacteriaaceae

Which of the following is NOT correct about the outer membrane of a Gram-negative proteobacterial cell wall?

in pathogens, lipopolysaccharide facilitates phagocytosis

Which of the following factors is NOT involved in initiation of spore formation in firmicutes?

light limitation

Some gram-negative bacteria branch more deeply from the proteobacteria than the five greek-lettered classes do from each other. which phyla listed below is deep branching gram-negative?

proteobacteria

which phylum contains the purple bacteria?

proteobacteria

the following bacterial genera belong to the enterobacteriaceae. in particular, the heavily flagellated _________ displays swarming behavior prior to forming __________

proteus; biofilms

Which is NOT a common feature in many spirochetes?

rigid cell walls

A bacterial phylum is a group of organisms that share a common ancestor that diverged early from another bacteria based on

small-subunit (16s) rRNA sequences

which of the following is NOT correct with respect to the species of Frankia

some species have been found to form spores

The type of telomere pictured below is found in

streptomyces

bacteriodetes are important components of what ecosystem?

the human gut

Which of the following is NOT correct about microorganisms in the phylum Thermotogae?

they are aerobic heterotrophs

Which of the following is NOT correct with respect to the mycoplasmas?

they have some of the largest bacterial genomes

Which of the following is NOT correct regarding rhizobia?

they provide the host with leghemoglobins, which help the plant hosts combat pathogens

Which genus within the spirochetes includes the causative agent of Lyme disease?

Borrelia

a trait that differentiates all firmicutes and actinobacteria is

GC content

bacteria are widely diverse in their cell structure, metabolism, and ecological adaptations, but share some common traits. Which of the following statements is NOT true?

Mycoplasmas contain abnormal peptidoglycan and thus are not susceptible to antibiotics.

An ancient ____________ is assumed to be in the same lineage as mitochondria.

Rickettsia

Cyanobacteria contain subcellular structures called carboxysomes that are rich in the enzyme ________ that fixes CO2

Rubisco

Which of the following is an extremophile?

bacillus alkalophilus

Pseudomonas aeruginosa may form _______ in the lungs of cystic fibrosis patients

biofilms

cyanobacteria are the only prokaryotes that use ________ to photolyze water to produce oxygen

both photosystems I and II

Methylobacterium species are methylotrophs, which means that they

can oxidize reduced single-carbon compounds

which of the following is NOT a common cyanobacteria morphology

endospore

Cyanobacteria participate in multilayered microbial mats with sulfur phototrophs. These other phototrophs absorb light if they lie below the cyanobacteria by

absorbing light at longer wavelengths than Cyanobacteria