Microbiology IE Assessment

Which cellular feature would least distinguish Gram-positive bacteria from Gram-negative bacteria?

• the formation of endospores

• the number of basal body rings

• the possession of pili

• the ability to transfer plasmids

An organism with 30S and 50S ribosomal units would be most likely identified as a(n)

• bacterium

• algae

• virus

• fungus

Eukaryotic microbes with chitin-rich cell walls would most appropriately be classified as

• helminths

• viruses

• fungi

• algae

A protoplast and protozoan share all of these prominent characteristics except that they

• are able to live in microbial communities

• lack a cell wall

• are unicellular

• are identified as Gram-positive bacteria

The prokaryotic microbes that lack peptidoglycan in their cell walls are

• protists

• archaea

• bacteria

• helminths

Microbes that do not produce oxygen as a result of photosynthesis are best identified as

• cyanobacteria

• algae

• fungi

• green and purple bacteria

To identify microbes using the results from a fermentation test, which products would be most useful to observe?

• acid and alcohol

• gas and aldehydes

• acid and gas

• alcohol and ketones

Which microbes would not produce water as a metabolic product from oxygen used for yielding energy in respiration?

• obligate aerobes

• microaerophiles

• facultative anaerobes

• aerotolerant anaerobes

The formation of mycelium is indicative of which microbes?

• fungi

• algae

• helminths

• archaea

Mycoplasmas are wall-less bacteria who are different from other bacteria because they have __________ in their plasma membrane.