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Ch 4: A Survey of Prokaryotic Cells and Microorganisms
BIO 2125 Microbiology (Online)
Terms in this set (76)
Which of the following is not a characteristic shared by all cells?
The DNA of an organism is organized into discrete bodies called
Internal cell components such as the nucleus and mitochondria are known as
Which of the following are characteristics found among both eukaryotes and prokaryotes?
They have phospholipids in their cell membrane.
They possess chromosomes.
They may possess a cell wall.
Viruses are not considered living things because they only show signs of life when they are inside a host ________
All cells that are capable of replication and metabolism contain which of the following characteristics?
A chromosome is made of which of the following?
In the process of ________ reproduction, offspring are produced by combining sex cells of two parents, whereas the process of ________ reproduction creates new cells from parent cell
Which of the following are examples of organelles?
Prokaryotic cells evolved on Earth about how many years ago?
3.5 billion years
Which is true regarding all bacterial cells?
All lack a nucleus.
Which of the following are characteristics inherent to life?
Growth and development
In ________ reproduction, the offspring are clones of the parent cell.
The two major types of prokaryotic cells are ________ and _________.
Which of the following is an internal component of a prokaryotic cell?
Which of the following are not found in all prokaryotic cells?
Bacterial appendages can be divided into which two functional groups?
Provide attachment sites or channels
Which of the following are not internal components of a prokaryotic cell?
Which appendage(s) provide motility?
The basal body, hook, and filament are components of ________ in bacteria
Which of the following structures are essential to all prokaryotic cells?
Bacterial appendages that provide attachment sites or channels are called __________ and _______
Which of the following describes a cluster of flagella emerging from the same site?
Appendages that propel bacterial cells through an aqueous environment include _________ and axial filaments
Identify the stack of rings anchoring the flagellum into the cell wall and cell membrane of a bacterium.
Which of the following are types of flagellar arrangements with more than one flagellum?
Which of the following describes a random arrangement of flagella distributed all over the bacterial cell?
The movement of an organism away from a chemical repellent is called ______ chemotaxis
The __________ of a bacterium rotates counterclockwise which causes the cell to "swim" in a smooth, linear direction toward a chemical stimulus.
The basal body, hook, and filament are components of ______ in bacteria
Which of the following describes the movement towards or away from light?
A tuft of flagella from a single site is referred to as a(n) ____________ arrangement, whereas flagella dispersed over the surface of the cell is referred to as _________.ous
Which of the following is the movement towards or away from a chemical stimulus?
Counterclockwise rotation of the flagellum causes a bacterial cell to swim or _________ towards a stimulus
Which of the following bacteria use their flagella to invade mucus membranes and cause infections?
Which of the following bacteria could exhibit phototaxis?
What is the name for corkscrew-shaped bacteria?
A(n) ________ filament is a periplasmic flagellum found in some spirochete bacteria.
Which of the following bores through the stomach lining and causes gastric ulcers?
Identify which of the following are external structures used primarily for direct contact interactions with other cells.
_________ are spiral-shaped bacteria characterized by periplasmic flagella and display a worm-like mode of locomotion.
Twisting or flexing of spirochete bacteria is attributed to which of the following?
Which of the following describes the function of fimbriae?
Bacterial pili are composed of the protein __________
Bacteria are able to attach to surfaces and other bacteria using the surface appendages known as _________ and _________
The transfer of DNA between bacterial cells is called
Neisseria gonorrhoeae binds to the epithelial cells of the reproductive tract by means of which of the following?
Type IV pili
Which of the following forms from a complex association of microorganisms that grow on a surface or tissue matrix?
Pili are typically used for which of the following?
Elongated, rigid tubes on gram-negative bacteria that are involved in the transfer of DNA from one cell to another are called which of the following?
The presence of type IV pili cause a type of twitching movement in bacteria of which of the following genera?
The _________ _________ is a protective covering in some bacteria. It is composed of thousands of copies of a single protein.
identify the small bristle-like structures on the surface of bacteria that are involved in adhesion.
What is the glycocalyx?
An extracellular coating that provides protection to the cell
Bacterial pili are composed of the protein
Identify the two types of glycocalyx in bacteria.
Which of the following bacteria can produce an S layer under harsh conditions?
The _________ is a polysaccharide protective coating outside of the bacterial cell wall that is called either a capsule or slime layer based on its structure.
What is the primary function of the bacterial capsule?
Identify the two main components of the cell envelope in most bacteria.
The cell envelope of gram-_________ bacteria is composed of an outer membrane, cell wall, and a cell membrane.
Gram-______ cell walls are thinner than Gram-______ cell walls, providing them with relatively greater flexibility and sensitivity to lysis.
Which of the following structures is external and can protect the bacterial cell from various host immune responses?
Which of the following prevents the rupture of bacterial cells by internal osmotic pressure?
The cell envelope encloses the
What structural difference is found in gram-positive cells but not in gram-negative cells?
Single cell membrane
Which type of cell wall is thinner and does not retain the crystal violet stain in the gram stain?
Peptidoglycan is a component of the cell wall of which of the following organisms?
Which of the following antibiotics affect the integrity of the cell wall of bacteria, thereby making them susceptible to lysis?
Lysozyme digests which of the following in the bacterial cell wall?
The cell wall in bacteria is primarily composed of
The bulk of the Gram-positive cell wall is a homogeneous sheath of which of the following?
Identify the area between the cell wall and cell membrane in gram-positive bacteria
Which term describes the process of a cell breaking open or rupturing?
Tears and saliva contain ________ an enzyme which digests peptidoglycans and breaks down bacterial cell walls.
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