Test 01
Which of the following occurs during assembly of an enveloped virus?
A nucleocapsid is formed and viral spikes insert in host cell membrane
Endospores are ________
All of the choices are correct.
_____ Manual of Systematic Bacteriology is a manual of bacterial descriptions and classifications
Bergey's
Which is mismatched?
Plasmodium—protozoan that causes Chagas disease
The Nobel Prize was awarded to Kary Mullis in 1993 for inventing what technique to amplify and subsequently analyze DNA?
Polymerase chain reaction
Stages of binary fission in the correct order
Replication of the chromosome, formation of central protein band, septum divides daughter cells
Which of the following pairs is mismatched?
Secondary infection - infection spreads to several tissue sites
Which of the following statements is not true regarding the differences between bacteria, archaea, and eukaryotes?
The cell walls of bacteria and archaea both contain the complex macromolecule peptidoglycan, whereas only the organisms in kingdom Plantae contain cell walls, which are made of cellulose.
The all-purpose media Tryptic Soy Agar (TSA) contains the following four ingredients; pancreatic digest of casein, digest of soybean meal, NaCl and agar. TSA is best described as
a complex media
87 people developed diarrhea, fever and abdominal cramps in the aftermath of a wedding. On diagnosis it was determined that they were suffering from salmonella, and after taking their histories, they all reported that they had eaten the chicken at the reception. This is an example of
a point-sourced epidemic
Which of the following will result when 1% to 5% agar is added to nutrient broth, boiled and cooled?
a solid medium
A halophile would grow best in________
acid pools
Protozoan cysts ________
are helpful in surviving unfavorable conditions.
All of the following pertain to virus envelopes except ________
are located between the capsid and nucleic acid
The two functions of bacterial appendages are _______
attachment and motility
The human body typically begins to be colonized by its normal biota
before birth, in utero
Persistent viruses that can reactivate periodically are _____
chronic latent viruses
Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella
contain microtubules
The microorganisms that recycle nutrients by breaking down their dead matter and wastes are called
decomposers
When would Koch's postulates be utilized?
determination of the cause of a new disease in a microbiology research lab
The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called _____
diffusion
Atoms and molecules are in constant, random motion. Movement of any molecule along its concentration gradient is termed _____, and movement of water in the same manner, across a selectively permeable membrane, is called _____
diffusion; osmosis
The core of every virus particle always contains _____
either DNA or RNA
Which type of microscope achieves the greatest resolution and highest magnification?
electron
Which type of microscope does not use light in forming the specimen image?
electron
An infectious agent that originates from outside the body is called _____
exogenous
Bacteria that require special growth factors and complex nutrients are termed
fastidious
Viruses attach to their hosts via ________
host glycoproteins
Larval development of helminths occurs in which host?
intermediate (secondary) host
Which of the following does not pertain to endotoxin?
it is found in acid-fast bacterial cell walls
Microorganisms require large quantities of _____ for use in cell structure and metabolism.
macronutrients
Human pathogens fall into the group termed _____
mesophiles
The effect of "good" microbes against invading microbes is called
microbial antagonism
There a nine peripheral pairs and one central pair of ________ found inside eukaryotic flagella and cilia
microtubules
Which organelle contains cristae where enzymes and electron carrier for aerobic respiration are found?
mitochondria
Cells grown in culture form a(n)
monolayer
A client has a serious case of the flu. A random sample of sputum was taken from the patient coughing up blood. The lab tech said they had isolated a bacterium that did not have nay peptidoglycan. You hypotesize that the identity of this microbe could possibly be
mycoplasma pneumoniae
Spirochetes have a twisting and flexing locomotion due to appendages called _____
periplasmic flagella (axial filaments)
Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called
prokaryotes
When buds remain attached, they form a chain of yeast cells called
pseudohyphae
The alpha helix is a type of _____ protein structure
secondary
Long-term or permanent damage to tissues or organs resulting from a specific disease are called _____
sequelae
The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _____
sex pili
The objective, measurable evidence of disease evaluated by an observer is termed a(n) _____
sign
The smallest and most significant taxon is _____
species
A chain of rod-shaped cells would be called a
streptobacillus
The first primitive eukaryotic cells likely evolved from
the last common ancestor
Infectious naked strands of RNA that affect plants are called _____
viroids
The development of antiviral drug therapy is difficult because ________
viruses are obligate intracellular parasites so the host cell can be harmed by the drug.
The outcome of the Gram stain is based on differences in the cell's
wall