Micr 351 - Study guides, Class notes & Summaries

MICR 351 EXAM QUESTIONS AND ANSWERS – WELL ARRANGED 1. How many hierarchy levels are there in taxonomic rank, excluding kingdoms? a. Five b. Seven c. Ten d. Twelve - Answer-Answer: b. Seven 2. What is a Type Strain in taxonomy? a. Any variant within a species b. The prototype strain first studied and best characterized c. A strain that differs in serovar d. A strain with unique morphological characteristics - Answer-Answer: b. The prototype strain first studied ...

MICR 351 FINAL EXAM QUESTIONS WITH ANSWERS REVISED AND UPDATED What is directly involved in gram-negative peptidoglycan cross-linking? - Answer-Diaminopimelic acid (DAP) T or F: A biofilm, smaller than a capsule, is a polysaccharide layer that is produced immediately at the surface of bacteria that protect them from dessicaiton - Answer-False Respectively, the amino acid side chains of Top and Ile at neutral pH are: - Answer-Top uncharged aromatic and Ile is non-polar hydrophobic In a...

MICR 351 TEST QUESTIONS WITH ALL ANSWERS VERIFIED What does the D-value represent? - Answer-The time in minutes required to kill 90% of microbial population. What does the Z-value represent? - Answer-The increase in temp required to reduce microbes by one log. What factors affect the effectiveness of antimicrobial agents? - Answer--pop. size -pop. composition or susceptibility -conc. and intensity of agents -duration of exposure -local environment -temp What is pasteurization? -...

MICR 351 TESTED QUESTIONS WITH ALL ANSWERS AND ALL PRINTED PAGES Northern Hybridization? - Answer-mRNA-cDNA hybridization to find gene of interest using DNA probe to identify which bond holds gene of interest Western Hybridization? - Answer-Antibody-protein hybridization, where antibodies bind to a specific protein bond that contains target protein that produces antibody - used in vaccines and other tests, such as pregnancy tests Functional genomics - Answer-Microarrays and RNA-sequence...

How many phyla are in Archaea? Two: 1) Euryarchaeota 2) Crenarchaeota Gram-Negative Archaea characteristics: S layer made of proteins or glycoproteins Gram-Positive Archaea characteristics: Have pseudomurein (cell wall) that is resistant to lysozome and lactams Archaea characteristics: -Extremophiles -Majority of components in membrane is not made up of phospholipids but glycerol-diether, glycerol-tetraether, non-polar lipids -Use Entner-Duodruff pathway to degrade glucose Where are ...