Exam 18: Other Bacteria

In the acid- fast (Ziehl- Neelsen) stain, the role of the phenol is to enhance penetration of the crystal violet into the cell wall.

Although the determination of hemolysis patterns on blood agar is interesting, it does not play a role in the identification of subdivisions within the genus Streptococcus.

__________is a copolymer of aspartic acid and__________ , and it serves as a nitrogen storage structure in many cyanobacteria.

An unusual biochemical feature of species of Thermodesulfobacterium is the presence of__________.

Which of the following is a characteristic of streptomycetes?

_________is the name of the genus of gram- positive, rod- shaped bacteria used in the production of fermented milk products.

The mycobacteria are not readily stained by the Gram stain method because of high mycolic acid content.

Which genus is capable of digesting agar, cellulose, and chitin?

_______are bacteriochlorophyll- rich bodies attached to the cytoplasmic membrane within bacterial cells.

Which of the following endospores- forming genera are cocci rather than rods?

The spirochete ___________, which causes the sexually transmitted disease, syphilis, has remained unculturable despite many efforts.

Which species is commonly present on the skin of humans, normally does not cause disease, and grows well on 7.5% NaCl- containing media?

The site of nitrogen fixation in most of the cyanobacteria is the

Cyanobacteria can be divided into morphological groups that include all of the following EXCEPT

Which of the following is NOT a trait of the chlamydias?

Explain the processes of homofermentation and heterofermentation as they occur in the lactic acid bacteria.

Describe the cell division mechanism coryneform bacteria undergo and the morphological result.

Homofermentative lactic acid bacteria produce_______ as a result of fermentation of sugars, while heterofermentative lactic acid bacteria produce_______ , _______, and_______following sugar fermentation.

Chlamydia trachomatis is the causative agent of trachoma, the leading cause of blindness in humans.

The homofermentative and heterofermentative lactic acid bacteria can be differentiated by the production of _________and_________ the heterofermenters during fermentation.