Part 1 Flashcards
______ are used to grow stock cultures that can be refrigerated after incubation and maintained for several weeks.
A.) Broths
B.) Agar slants
C.) Plated media
B.) Agar slants
______ are used to grow microbes when fresh cultures or large numbers of cells are required.
A.) Broths
B.) Agar slants
C.) Plated media
A.) Broths
______ are used for obtaining isolation of species, differential testing, and quantifying bacterial densities.
A.) Broths
B.) Agar slants
C.) Plated media
C.) Plated media
A microbial culture consisting of two or more species is said to be a _______, whereas a _______ contains only a single species.
A microbial culture consisting of two or more species is said to be a mixed culture, whereas a pure culture contains only a single species.
The ______ is a method of isolation in which a diluted microbial sample is deposited on an agar plate and spread uniformly across the surface with a glass rod.
spread plate technique
Organisms that grow only below 20 degrees Celsius are called _______.
A.) psychrophiles
B.) psychotrophs
C.) mesophiles
D.) Thermophiles
A.) psychrophiles
Organisms adapted to cold habitats that fluctuate from about 0 degrees to above 30 degrees Celsius are called ________.
A.) psychrophiles
B.) psychotrophs
C.) mesophiles
D.) Thermophiles
B.) psychotrophs
Bacteria adapted to temperatures between 15 degrees and 45 degrees Celsius are known as _______.
A.) psychrophiles
B.) psychotrophs
C.) mesophiles
D.) Thermophiles
C.) mesophiles
Most bacterial residents in the human body, as well as numerous human pathogens, are _______.
A.) psychrophiles
B.) psychotrophs
C.) mesophiles
D.) Thermophiles
C.) mesophiles
Organisms that are adapted to temperatures above 40 degrees Celsius are known as _______.
A.) psychrophiles
B.) psychotrophs
C.) mesophiles
D.) Thermophiles
D.) Thermophiles
Each species of bacteria is characterized by a minimum, maximum, and optimum temperature collectively known as its _______.
cardinal temperature
