Viable counts - Guides d'étude, Notes de cours & Résumés

GOVT 2305- EXAM I, II, III(2024)GOVT 2305- EXAM I, II, III Which level of government writes the majority of all criminal laws? - ANS State governments Which level of government is not mentioned at all in the Constitution? - ANS city government What was the Supreme Court case United States v. Lopez important? - ANS It was the first time since the New Deal that the Supreme Court limited the power of Congress found under the commerce clause The Constitution expressly ...

Which of the four phases of a microbial population's growth and development would be the best for optimally preserving food quality, shelf life, and protecting food safety? Correct Answer-exponential? In the image below depicting the onset of sublethal injury in a population of a microorganism, which line (solid or dotted) correctly depicts the actual population of living/viable microorganisms during processing exposure and thereafter? Each line depicts the changes in counts of a microorgani...

CMMB 343 - Midterm 2 Question and answers rated A+ CMMB 343 - Midterm 2 What are 4 DIRECT methods of measuring bacterial growth? - correct answer 1. Flow methods: Coulter counter, flow cytometry 2. Microscopic counts: Counting chambers 3. Plate counts 4. MPNs Coulter counter - correct answer electronically scans a volume of fluid as it passes through a tiny pipette. The microbes passing through disrupt the electrical current, which is detected. Flow cytometry - correct answer Si...

CMMB 343 - Midterm 2 Questions with complete solution 2024 What are 4 DIRECT methods of measuring bacterial growth? - correct answer 1. Flow methods: Coulter counter, flow cytometry 2. Microscopic counts: Counting chambers 3. Plate counts 4. MPNs Coulter counter - correct answer electronically scans a volume of fluid as it passes through a tiny pipette. The microbes passing through disrupt the electrical current, which is detected. Flow cytometry - correct answer Similar to coulter...

FISH - Cells fixed in place Fluorescently labeled probes consisting of 165 rRNA gene sequence sent to attach to RNA View in Epifluorescence microscope Cultivation independent methods - DNA from unculturable bacteria can be amplified and sequenced by PCR Sequences can be used to produce fluorescent probes that will bind to complementary DNA (Fluorescent In Situ Hybridization FISH) Microbial consortia - Microbes that can't grow on their own Metagenomics - DNA is isolated from an envir...

4 basic steps of bacterial reproduction 1. Growth of cell size & increase in cell components 2. Replication of DNA 3. Division of the cytoplasm (cytokineses) 4. Septum formation and division of daughter cells Generation time time takes to double population E. Coli generation time 20 minutes B. Subtilis generation time 120 min S. Aureus generation time 30 min. M.tuberculosis generation time 15-20 hrs Closed cultures have ___ resources infinite Culture density the number of cells per unit v...

4 Basic Steps of binary fission : 1. Growth of cell size 2. Replication of DNA 3. Division of cytoplasm 4. Septum formation & cell division Z Ring Assembly : FtsZ assembles Z ring to form divisome Generation Time : time it takes to double the population Lag Phase : Cells adjust to culture medium; no change in population What factors determine the duration of the lag phase? : Genetic makeup, media composition, initial inoculum size During which phase of the growth curve is it most ap...

4 Basic Steps of binary fission - Answer-1. Growth of cell size 2. Replication of DNA 3. Division of cytoplasm 4. Septum formation & cell division Z Ring Assembly - Answer-FtsZ assembles Z ring to form divisome Generation Time - Answer-time it takes to double the population Lag Phase - Answer-Cells adjust to culture medium; no change in population What factors determine the duration of the lag phase? - Answer-Genetic makeup, media composition, initial inoculum size During which phase of...

CMMB 343 - Midterm 2What are 4 DIRECT methods of measuring bacterial growth? - correct answer 1. Flow methods: Coulter counter, flow cytometry 2. Microscopic counts: Counting chambers 3. Plate counts 4. MPNs Coulter counter - correct answer electronically scans a volume of fluid as it passes through a tiny pipette. The microbes passing through disrupt the electrical current, which is detected. Flow cytometry - correct answer Similar to coulter counter, except it counts disruptions of...

OB Exam 1 Questions and Answers Graded A In a routine pregnancy, how often are prenatal doctor visits made? every 4 wks for 28wks, every 2 wks during 28-36 wks, every wk from 36-41qks, twice weekly after that What things are done during the initial prenatal visit? done at 8 weeks gestation; determine EDD; obtain hx; risk assessment; vital signs/weight/urinalysis; physical exam; FHR assessment (doppler); and labs What are things done during the ongoing prenatal visits? vs, weight, urinalysis; f...

Cultivation independent methods - DNA from unculturable bacteria can be amplified and sequenced by PCR Sequences can be used to produce fluorescent probes that will bind to complementary DNA (Fluorescent In Situ Hybridization FISH) FISH - Cells fixed in place Fluorescently labeled probes consisting of 165 rRNA gene sequence sent to attach to RNA View in Epifluorescence microscope Metagenomics - DNA is isolated from an environmental sample and sequenced Metagenomic information must stil...