Chemicals used to decrease the number of microbes on living tissues are called _____ -
Antiseptics
A Durham tube is included in the LT broth tubes to detect _____, a byproduct of lactose fermentation. -
Gas
_____ (lytic/lysogenic) phages can integrate its DNA into the host genome. - Lytic
____...
UConn MCB 2610 Final Lab Practical
Chemicals used to decrease the number of microbes on living tissues are called _____ -
Antiseptics
A Durham tube is included in the LT broth tubes to detect _____, a byproduct of lactose fermentation. -
Gas
_____ (lytic/lysogenic) phages can integrate its DNA into the host genome. - Lytic
_____ will occur around the colonies, indicating amylase production and starch utilization. - Red
dying from iodine
_______ is an opportunistic pathogen that commonly causes staph infections. - Staphylococcus
aureus
A _____ agent does not kill a microorganism, but rather just inhibits its growth. - Bacteriostatic
A clear area due to lysis by phage in a lawn of host cells is called a - Plaque
A confluent growth of cells in the soft agar is called a _____ - Lawn
An antibiotic that is effective against a wide varity of pathogenic microorganisms is called a _____
antibiotic. - Broad spectrum
Antiseptic chemicals are used on _____. - Living tissue
Bacteria can prevent phage attachment and escape infection by acquiring mutations in genes which alter
their _____ - Cell surface receptors
, Chemicals used to decrease the number of microbes on inanimate objects are called _____ -
Disinfectants
Coliforms are a subgroup of enteric bacteria classified by their ability to ferment which sugar? -
Lactose
Define generation time. - Time for population to double
During the lytic infection process, what does the phage particle inject into the host cells? -
DNA/genome
Given an example of a fomite. - Anything that people touch/use regularly
Growth concentrated at the bottom of a thioglycolate broth tube indicates the organism is an
aerobe/anaerobe? - Anaerobe
Growth only along the path of the inoculating needle indicates that the bacteria is motile/non-motile. -
Non-motile
How is casein hydrolysis detected? - Clearing around growth
How many times do you get culture from the tube while performing a t-streak? - Once
If a nitrate broth tube does not change color after adding nitrate reagents A&B and zinc, did nitrate
reduction occur? - Yes
If a nitrate broth tube does not change color after the addition of nitrate reagents A&B, but turns red
with the addition of zinc, did nitrate reduction occur? - No
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