Exam 1 Flashcards
Viruses are generally measured in
nanometers
The work of Edward Buchner and the discovery of enzymes laid the foundations for the field of
biochemistry
The “run” in bacterial motility is the results of _________ rotation of the flagella
counterclockwise
The microbes commonly known as ______ are single-celled eukaryotes that are generally motile.
protozoa
A single basic dye is used in simple stains
True
A cell that contains a nucleus is called a _________
eukaryotic cell
The placement of an organism into a domain is made on the basis of _________
ribosomal RNA analysis
The most appropriate unit of measurement for an intact archaea is the
micrometer
What is a type of glycocalyx that is firmly attached to the cell
capsule
Carbolfuchsin is the ______ in the acid-fast stain
primary stain
Gram stain order
Crystal violet, Iodine, Alcohol, Safranin
Which of the following classification methods relies on the morphology of organisms?
physical characteristics
which of the following never have cell walls?
animal cells
This microscope produces an image of a light cell against a dark background; internal structures not visible
darkfield microscope
Who used sealed vials proving spontanous generation does not occur?
Spallanzani
Viral replication occurs
intracelllulary
A term synonymous with immunization is derived from the Latin name of the cowpox virus
vaccination
Which microscope is used to observe viruses and the internal structure of thinly sectioned cells?
transmission electron microscope
Using a microscope, you observe an amoeba moving toward a food source- this is an example of
responsiveness
A serological test that involves the clumping of antigen antibody is the
agglutination
All of the following are common to both the Gram stain and the acid- fast stain except
a chemical mordant
Which of the following is not a component of bacterial flagella?
tubulin
Who discovered penicilin?
Fleming
What has a peri-plasmic space?
Gram-negative bacteria only
Eukaryotic ribosomes are composed of 50s and 30s subunits
false
Antoni van Leeuwenhoek was the first person in history to
view microorganisms and record these observations
fragments of what released from gram-negative bacteria into the bloodstream produce fever and shock?
LPS
The glycocalyx of a eukaryotic cell performs all of the fllowing except -
transfer genetic material between cells
Which of the following scientists provided evidence in favor of the concept of spontaneous generation?
Needham
Heat is used in what staining procedure to drive the stain into cells
acid-fast and endospore
