Question 1

Many bacteria that exhibit gliding motility are able to use as a nutrient source insoluble material that they encounter while gliding.

Accepted Answer

Many bacteria that use gliding motility are known to also use insoluble material as a nutrient source while moving through their environment. This ability is known as "substrate-dependent motility." Examples of such bacteria include Myxococcus xanthus and Flavobacterium johnsoniae.

Question 2

Nitrogen fixation in the hindgut of the termite is carried out by _______.

Accepted Answer

Nitrogen fixation in the hindgut of termites is carried out by a variety of microorganisms, including spirochetes. These bacteria are capable of converting atmospheric nitrogen into a form that the termite can use for its nutritional needs.

Question 3

The part of the spirochete that houses the cytoplasm and the nucleoid of spirochetes is called the _______ cylinder.

Accepted Answer

The part of the spirochete that houses the cytoplasm and the nucleoid of spirochetes is called the protoplasmic cylinder. This structure is essential for the unique morphology and motility of these bacteria.

Question 4

Although the function of the flexible outer sheath in which the axial filaments of spirochetes lay is unknown,it is essential (i.e.,the bacteria will not survive if it is removed).

Accepted Answer

The statement is true. The flexible outer sheath is essential for the survival of spirochetes, although its exact function is unknown.

Question 5

Spherical resting cells produced by Sporocytophaga are called ______.

Accepted Answer

Spherical resting cells produced by Sporocytophaga are called microcysts. Heterocysts are specialized cells found in some filamentous cyanobacteria, oocysts are hardened structures produced by some parasites, and nitrocysts are not a known type of cell.

Question 6

Gliding motility can be used to propel bacteria ______.

Accepted Answer

Gliding motility is a mode of bacterial movement that allows them to travel across solid surfaces, such as agar or host cell membranes. It does not involve movement through liquids or the air, and is not associated with the cytoskeleton of host cells.

Question 7

Gliding motility is a mechanism used by some prokaryotes to swim slowly through liquids.

Accepted Answer

Gliding motility refers to a type of movement used by some bacteria and microorganisms to move across solid surfaces, not through liquids.

Question 8

Elementary bodies of chlamydiae are specialized for reproduction rather than infection.

Accepted Answer

Elementary bodies of chlamydiae are specialized for infection, serving as the infectious form that attaches to and enters host cells, whereas reticulate bodies are specialized for reproduction within the host cell.

Question 9

The complex of periplasmic flagella that mediates the movement of spirochetes is referred to as the ______.

Accepted Answer

The correct term for the complex of periplasmic flagella that mediates the movement of spirochetes is referred to as either "periplasmic flagella" or "axial filament." Both terms are used interchangeably to describe the structure that allows spirochetes to move in a corkscrew-like fashion.

Question 10

Member of the genus Cytophaga contribute significantly to the process of wastewater treatment.

Accepted Answer

Cytophaga bacteria are aerobic, rod-shaped, and play an important role in the process of decomposing organic matter in wastewater treatment plants. They are capable of breaking down complex organic molecules and converting them into simpler compounds that can be easily filtered and removed from wastewater. Therefore, members of the genus Cytophaga are considered key players in the process of wastewater treatment.

Question 11

Chlamydiae are incapable of producing many key metabolites,for which they must rely on their host.

Accepted Answer

Chlamydiae are obligate intracellular bacteria that depend on the host cell for many essential nutrients, including ATP, nucleotides, amino acids, and lipids. They lack the metabolic pathways for producing these molecules and thus rely on the host for survival and replication.

Question 12

It is estimated that anammox and the anammox reaction may contribute as much as 20% to the cycling of nitrogen in the world's oceans.

Accepted Answer

The answer of It is estimated that anammox and the...

Question 13

A unique feature of the _________ that distinguishes them from other bacteria is their ability to move through highly viscous liquids.

Accepted Answer

The answer of A unique feature of the _________ that...

Question 14

Analysis of the nucleotide sequence of the genome of Chlamydia trachomatis suggests that it may be able to synthesize some of its own ATP.

Accepted Answer

Analysis of Chlamydia trachomatis genome suggests the presence of genes involved in the synthesis of energy and metabolic pathways, indicating the ability to synthesize its own ATP.

Question 15

The spirochetes include the causative agents for ______.

Accepted Answer

Spirochetes include the causative agent for Lyme disease, which is caused by the bacterium Borrelia burgdorferi. The other diseases listed are caused by different types of bacteria.

Question 16

As much as ______ of the bacteria isolated from human feces belong to the genus Bacteroides.

Accepted Answer

Studies have shown that approximately 30% of the bacteria isolated from human feces belong to the genus Bacteroides.

Question 17

The infectious stage of chlamydiae is called a(n)______ body.

Accepted Answer

The elementary body is the infectious stage of chlamydiae. It is a small, spherical structure that is able to survive outside of host cells and infect new ones. The elementary body then transforms into the reticulate body, which is the replicative stage, once inside a host cell.

Question 18

The Gram-negative chlamydiae are ______.

Accepted Answer

The Gram-negative chlamydiae are obligate intracellular parasites, meaning they cannot replicate outside of a host cell. They are not photosynthetic or motile due to periplasmic flagella, and they are not Gram-positive spore-forming rods.

Question 19

Bacteroides inhabit the intestinal tract of mammals and benefit the host by degrading which of the following?

Accepted Answer

Bacteroides are known for their ability to degrade a wide range of complex carbohydrates, including cellulose and pectin, which are components of plant cell walls that are indigestible by mammals. Therefore, all choices are correct.

Question 20

The site of anaerobic ammonia oxidation in the recently described genera Brocadia,Kuenenia,Scalindua,and Anammoxoglobus is called the _______.

Accepted Answer

The answer of The site of anaerobic ammonia oxidation in...

Quiz 21: The Deinococci, Mollicutes, and Nonproteobacterial Gram-Negative Bacteria