Exam 11: Characterizing and Classifying Prokaryotes

The are autotrophs which live in anaerobic environments thought to be similar to conditions on the early Earth, and may have diverged from other bacteria far back in time.

Some obligately anaerobic are used in sewage treatment, and produce a fuel that can be used to produce electricity.

Nitrogen is frequently a limiting nutrient even though the atmosphere of the planet consists mostly of nitrogen. Discuss the prokaryotes described in this chapter which have roles in the availability and cycling of nitrogen in the biosphere.

The (bacilli/Lactobacilli/bacteroids) are a group of Gram-negative bacteria that include obligate anaerobes normally found in the intestinal tracts of animals and humans.

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

Gram negative facultative anaerobes that metabolize carbohydrates via glycolysis are members of the

Which of the following bacterial genera plays an important role in environmental nitrogen cycles?

Some members of the alphaproteobacteria produce a structure called a (prosthecae/pilus/filament) to produce extra surface area for nutrient absorption.

A flexible, spiral-shaped bacterium is called a

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

Describe the similarities and differences observed among phototrophic bacteria.

Mycoplasmas are pleomorphic because they

Cocci can be spherical as well as kidney-shaped.

A Gram stain of a tissue sample from a patient shows Gram-negative spheres that can barely be resolved on the best light microscope. A transmission electron micrograph reveals the spheres have a double membrane but no cell wall. The intracellular parasites are likely to be a

Unusual cellular extensions called prosthecae are associated with which of the following groups of proteobacteria?

Rocky Mountain spotted fever is caused by Gram-negative tiny bacilli that are intracellular parasites. They are in the genus

When an endospore germinates, it gives rise to two daughter cells called vegetative cells.

The arrangement shown in the figure is characteristic of (Actinomycetes/Caulobacter/Myxobacteria/Planctomyces) cells. (Use genus or taxon name.)

Phototrophic bacteria that use chlorophyll a are in the phylum

A species of the genus Streptococcus is the leading cause of