128 terms


Microbiology Chapters 4-6
Bacterial cells could have any of the following appendages except:
Spirochetes have a twisting and flexing locomotion due to appendages called:
Perisplasmic Flagella (axial filaments)
The short, numerous appendages used by some bacterial cells for adhering to cell surfaces are called:
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called
Sex pili
All bacterial cells have:
A chromosome
The terms that refers to the presence of glagella all over the cell surface is:
An important indicator of evolutionary relatedness is to determine:
Nitrogen base sequence of rRNA
Which is mismatched:
Tenericutes - waxy acid fast cell walls
Which is Mismatched:
Green sulfur bacteria - photosynthetic anaerobes that use sulfur in metabolism
The presence of thylakoids, phycocyanin, gas inclusions and cysts would be associated with
archaea do not have th etypical peptidoglycan structure found in bacteria cell walls:
Bacteria in the genus Mycoplasma and bacteria called L-forms lack cell walls:
Gram negative bacteria do not have peptidoglycan in their cell walls:
The function of bacterial endospores is:
Protection of genetic material during harsh conditions
Chemical analysis of a bacterial cell structure detects calcium dipicolinic acid. What is the identity of this structure:
Endospores are
All of the above
Which term is not used to describe bacterial cell shapes:
Serological analysis for bacterial identification typically involves using:
Specific antibodies to the bacterial cell antigens
The periplasmic space is:
An important reaction site for substances entering and leaving the cell
Which of the following, pertaining to prokaryotic cell membranes is mismatched:
Glycocalyx - regulates transport of nutrients and waste
The site for most ATP synthesis in prokaryotic cells is the:
Cell Membrane
The bacterial chromosome:
Is part of the nucleoid
Which is mismatched:
Plasmids - genes essential for growth and metabolism
Magnetosomes are:
Composed of magnetic iron oxide particles
All of the following structures contribute to the ability of pathogenic bacteria to call disease except:
A prokaryotic cell wll that has primarily peptidoglycan with small amounts of teichoic acid and lipotiechoic acid is:
Gram positive
A bacterial genus that has a waxy mycolic acid in the cell walls is:
All of the following pertain to endotoxins except:
Found in acid fast bacterial cell walls
The difference in cell wall structure of Mycobacterium and Nocardia compared to the typical gram positive bacterial cell structure is:
Predominance of unique, waxy, lipids
Lipopolysaccharide is an important cell wall component of:
Gram Negative Bacteria
The outcome of the Gram stain is based on differences in the cell's:
Cell Wall
The most immediate result of destruction of a cell's ribosomes would be:
Protein synthesis would stop
A bacterial cell exhibiting chemotaxis probably has:
Which structure protects bacteria from being phagocytized:
If bacteria living in salty seawater were displaced to a freshwater environment, the cell structure that would prevent the cell from rupturing is:
Cell Wall
Peptidoglycan is a unique macromolecule found in bacterial:
Cell Walls
Hot carbol fuchin is the primary dye in the acid fast stain:
The region between the bacterial cell membrane and the cell wall is called the outer membrane:
The prokaryotic cell membrane is a site for many enzymes and metabolic reactions:
If during the gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram positive cells would be purple but gram negative cells would be colorless:
Endospores of certain bacterial species can enter tissue in the human body, germinate, and cause an infectious disease:
Iodine is the decolorizer in the Gram stain
If you observe rod shaped, pink cells on a slide that had just been gram stained, you can assume that their cell walls contain endotoxins:
The term diplococci refers to an irregular cluster of spherical bacterial cells:
Protists include
Algea and protozoa
The eukaryotic cell organelle that most resembels a bacterial cell is the:
Eukaryotic flagella differ from prokaryotic flagella because only eukaryotic flagella:
Contain microtubules
Cilia are found in certain:
Chitin is a chemical component of the cell walls of:
Cell walls are not found on typical cells of:
the site for ribosomal RNA synthesis is the
When a eukaryotic cell is not undergoing mitosis, the DNA and its associated proteins appear as a visible thread-like mass called the:
Histones are:
Proteins associated with DNA in the nucleus
The Eukaryotic cell's glycocalyx is:
Mostly Polysaccharide
Which of the following is found in eukaryotic cells but not in prokaryotic cells:
All of the choices are correct
The endosymbiotic theory says that precursor eukaryotic cells acquired flagella by endosymbiosis with a ______ ancestor, and others gained photosynthetic ability from endosymbiosis with a ________ ancestor:
Spirochete, Cyanobacteria
The cell's series of tunnel-like membranes functioning in transport and storage are the:
Endoplasmic reticulum
An organelle that is a stack of flattened, membraneous sacs and functions to receive, modify and package proteins for cell secretion is the:
Golgi apparatus
Which organelle contains cristae where enzymes and electrons carries for aerobic respiration are found:
Organelles found in algae but not found in protozoa or fungi are the:
Protists with contractile vacuoles:
Use them to expel water from the cell
The cytoskeleton:
All of the choices are correct
The size of a eukaryotic cell ribosome is
Filamentous fungi are called
When buds remain attached, they form a chain of yeast cells called:
Fungi that grow as yeast at one temperature but will grow as mold at another temperature is called:
Fungal spores:
Are only asexually produced
Which is not a characteristic of fungi
Blooms of certain dinoflagellates are associated with all of the following except:
Which is mismatched
All of the following are found in some or all protozoa except:
Cell wall
The motile, feeding stage of protozoa is called the
the group of protozoa that have flagella are the
Which is mismatched
Plasmodium - causes Chagis Disease
All of the following are helminths except:
Which of the following does not pertain to helminths:
In kingdom Protista
Larvae and eggs are developmental forms of:
The eukaryotic cell membrane is a bilayer of sterols:
Infections caused by fungi are called mycoses:
All fungi have hyphae
All algae have chloroplasts
Algae are classified into divisions based principally on their type of motility:
Viruses have the following except:
Host cells of viruses include:
All of the above
The core of every virus particle always contains:
Either DNA or RNA
Classification of viruses into families involves determining all the following characteristics except:
Biochemical reactions
Which of the following represents a virus family name:
Virus capsids are made from subunits called:
Helical and icosahedral are terms used to describe the shapes of a virus:
Cannot be seen in a light microscope
all of the following pertain to virus envelopes except:
Located between the capsid and nucleic acid
Which of the following is not associated with every virus:
These structures are used by bacteriophages to attach to host cell receptors:
Tail fibers
Which is incorrect about prophages:
Cause lysis of host cells
T-even phages:
infect Escherichia coli cells
The correct sequence of events in viral multiplication is:
Adsorption, penetration, replication, assembly, maturation, release (C)
The even that occurs in bacteriophage multiplication that does not occur in animal virus replication is:
Injection of the viral nucleic acid into the host cell
Viruses acquire envelopes around their nucleocapsids during
Which of the following will not support viral cultivation
Blood Agar
In general, most DNa viruses multiply in the host cell's ____________, while most RNA viruses multiply in the host cells ________.
Nucleus, Cytoplasm
Host range is limited by:
Type of host cell receptors on cell membrane
The virus-induced, specific damage to the host cell that can be seen in a light microscope is called:
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called:
Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called:
Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called:
Oncogenic viruses include all of the following except:
Measles virus
Which of the following is a true type of cytopathic effect:
all of the choices are correct
Uncoating of viral nucleic acid:
All of the choices are correct
Infectious protein particles are called
Infectious naked strans of RNA are called
Creutzfeld-Jacob disease is
A spongiform encephalopathy of humans
A naked virus does not have an envelope
Viruses are multramicroscopic because they range in size from 2?M to 450?M
Spikes are glycoproteins of the virus capsid.
Prophages can be activated into viral replication and entering the lytic cycle
A specific animal virus has the ability to attach to and enter almost any animal host cell:
Each virus is assigned to a genus status based on its host, target tissue and type of disease it causes.
Bacteriophages to not undergo adsorption to specific host cell receptors prior to penetration.
When a virus enters a host cell, the viral genes, redirect the genetic and metabolic activities of the host cell:
Viral spikes are inserted into the host cell membrane before budding or exocytosis:
Viruses are used to produce vaccines for prevention of certain viral infections:
One of the principal capsid shapes is a 20-sided figure with 12 evently spaced corners referred to as an __________ capsid.
A _________ is the protein shell around the nucleic acid core of a virus.
Viruses that infect bacteria are specifically called _________.
Diagnosis of viral infections sometimes involve analyzing the patient's blood for specific __________ that the immune system produced against the virus.
Two noncellular agents, smaller than viruses, are the infectious proteins called _________, and the infectious RNA strands called _______.
Prions, Viroids
During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the bacterial _____ _________.
Host chromosome
A common method for cultivating viruses in the lab is to use in vitro systems called __________ cultures.