MCB 2610 Lab Quiz Questions
Coliforms are a subgroup of enteric bacteria classified by their ability to ferment which sugar? -
lactose
A Durham tube is included in the LT broth tubes to detect ___, a byproduct of lactose fermentation. -
gas production
___ is an enzyme that degrades starch. - Amylase
___ is an opportunistic pathogen that commonly causes staph infections. - Staphylococcus aureus
A clear area due to lysis by a phage in a lawn of host cells is called a(n) ____. - Plaque
A confluent growth of cells in the soft agar is called a(n) ____. - lawn
A cross streak is used to measure phage efficiency in a specific host. (TRUE/FALSE) - False
A(n) ____ agent does not kill a microorganism, but rather just inhibits its growth. - bacteriostatic
All bacterial cells that perform respiration use oxygen as a terminal electron acceptor. (TRUE/FALSE) -
False
An antibiotic that is effective against a wide variety of pathogenic microorganisms is called a(n) ___
antibiotic. - broad spectrum
Bacteria can prevent phage attachment and escape infection by acquiring mutations in genes which alter
their _____. - cell surface receptors
, Bacteriostatic antiseptics kill bacteria. (TRUE/FALSE) - False
Brownian motion is the purposeful movement of microorganisms. (TRUE/FALSE) - False
Chemicals used to decrease the number of microbes on inanimate objects are called ____. -
disinfectants
Chemicals used to decrease the number of microbes on living tissues are called ___. - antiseptics
Complex media is made with a precise chemical composition. (TRUE/FALSE) - False
Define generation time - the amount of time it takes for the population to double
During the lytic infection process, what does the phage particle inject into the host cell? -
DNA/genome
Eosin-methylene blue (EMB) agar is used as a confirmed test for coliforms. (TRUE/FALSE) - True
Fermentative organisms can also perform respiration. (TRUE/FALSE) - False
Generation time is calculated in the log phase. (TRUE/FALSE) - True
Give an example of a fomite - Cell phone
Gram positive bacteria have a thick peptidoglycan layer which retains safranin and appears pink.
(TRUE/FALSE) - False
Gram stains and spore stains are examples of simple stains. (TRUE/FALSE) - False
Coliforms are a subgroup of enteric bacteria classified by their ability to ferment which sugar? -
lactose
A Durham tube is included in the LT broth tubes to detect ___, a byproduct of lactose fermentation. -
gas production
___ is an enzyme that degrades starch. - Amylase
___ is an opportunistic pathogen that commonly causes staph infections. - Staphylococcus aureus
A clear area due to lysis by a phage in a lawn of host cells is called a(n) ____. - Plaque
A confluent growth of cells in the soft agar is called a(n) ____. - lawn
A cross streak is used to measure phage efficiency in a specific host. (TRUE/FALSE) - False
A(n) ____ agent does not kill a microorganism, but rather just inhibits its growth. - bacteriostatic
All bacterial cells that perform respiration use oxygen as a terminal electron acceptor. (TRUE/FALSE) -
False
An antibiotic that is effective against a wide variety of pathogenic microorganisms is called a(n) ___
antibiotic. - broad spectrum
Bacteria can prevent phage attachment and escape infection by acquiring mutations in genes which alter
their _____. - cell surface receptors
, Bacteriostatic antiseptics kill bacteria. (TRUE/FALSE) - False
Brownian motion is the purposeful movement of microorganisms. (TRUE/FALSE) - False
Chemicals used to decrease the number of microbes on inanimate objects are called ____. -
disinfectants
Chemicals used to decrease the number of microbes on living tissues are called ___. - antiseptics
Complex media is made with a precise chemical composition. (TRUE/FALSE) - False
Define generation time - the amount of time it takes for the population to double
During the lytic infection process, what does the phage particle inject into the host cell? -
DNA/genome
Eosin-methylene blue (EMB) agar is used as a confirmed test for coliforms. (TRUE/FALSE) - True
Fermentative organisms can also perform respiration. (TRUE/FALSE) - False
Generation time is calculated in the log phase. (TRUE/FALSE) - True
Give an example of a fomite - Cell phone
Gram positive bacteria have a thick peptidoglycan layer which retains safranin and appears pink.
(TRUE/FALSE) - False
Gram stains and spore stains are examples of simple stains. (TRUE/FALSE) - False
