Chapter 11- The Prokaryotes: Domains Bacteria and Archaea

Flashcards covering key concepts, definitions, and examples from the lecture on Prokaryotes and their classification.

Bacteria were initially classified based on __ such as morphology, staining reactions, and presence of endospores.

their morphology and other obvious features.

The two domains of prokaryotes are and .

Bacteria and Archaea.

The genus __ is responsible for causing cat scratch disease.

Bartonella.

The key distinguishing feature of members of the phylum __ is their ability to carry out oxygenic photosynthesis.

Cyanobacteria.

The __ are gram-negative bacteria that have a common photosynthetic ancestor.

Proteobacteria.

The process of identifying pathogenic bacteria typically begins with __ staining and morphology.

Gram.

The genus __ is known for its role in producing acetic acid from ethanol.

Acetobacter.

Members of the genus __ are obligate intracellular parasites transmitted by ticks.

Rickettsia.

__ are capable of producing methane and live in anaerobic conditions.

Methanogens.

Bacteria of the genus __ are the best-known nitrogen-fixing bacteria associated with legumes.

Rhizobium.

The most common cause of peptic ulcers in humans is __ pylori.

Helicobacter.

Bacteria lacking a cell wall are classified into the phylum __.

Tenericutes.

Gram-positive bacteria with high G + C ratios are classified under the phylum __.

Actinobacteria.

Bacillus anthracis is the causative agent of __.

anthrax.

The term __ refers to the variation in bacterial morphology, especially in mycoplasmas.

pleomorphic.

Mycobacterium species, including Mycobacterium tuberculosis, are known for their __ cell wall structure.

waxy.

The best known example of a giant bacterium is __ namibiensis, discovered in coastal sediments.

Thiomargarita.

The __ cycle is used as a means of reproduction by the genus Chlamydia.

developmental.

The __ group of bacteria includes genera such as Clostridium, which are known for forming endospores.

Firmicutes.

The __ genus is linked to foodborne illness from undercooked shellfish and cholera.

Vibrio.

The disease caused by _ is known as syphilis.

Treponema pallidum.

__ is the term for bacteria that can appear either as rods or cocci based on environmental conditions.

Pleomorphic.

The categories 'Gram-negative' and 'Gram-positive' are based on differences in the __ of their cell walls.

structure.

__ is necessary for the growth of certain organisms, such as those in the genus Helicobacter, which require specific environmental conditions.

Microaerophily.

The red pigment produced by __ is a distinctive feature of this pathogenic bacterium.

Serratia marcescens.

__ are often in the human microbiome and play critical roles in health and disease.

Bacteria.

Organisms of the genus __ are known to induce nodules in leguminous plants for nitrogen fixation.

Rhizobium.

Major Gram-Negative Bacteria Phyla

Includes Proteobacteria (diverse, e.g., Salmonella, Rickettsia), Cyanobacteria (photosynthetic, nitrogen-fixing), Chlamydiae (intracellular pathogens), Bacteroidetes (human microbiome), and Spirochaetes (unique flagella).