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MCB 2610 Lab Quiz Questions And Answers Rated A+ New Update Assured Satisfaction

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  • MCB 2610 Lab
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  • MCB 2610 Lab

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 opportunist...

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  • August 23, 2024
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  • 2024/2025
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  • MCB 2610 Lab
  • MCB 2610 Lab
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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

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