Lag phase - Study guides, Class notes & Summaries

growth CORRECT ANSWER increase the number of cells binary fission CORRECT ANSWER cell division following enlargement of a cell to twice its minimum size generation time CORRECT ANSWER time required for microbial cells to double in number filamentous temperature sensitive (fts) CORRECT ANSWER properties of cells that have mutations in the fts proteins. (make them not divide normally) batch culture CORRECT ANSWER a closed-system microbial culture of fixed volume Typical growth curve...

QUESTION 1 [22] A three-phase synchronous generator with negligible armature resistance has synchronous reactance Xs = 1.65 p.u. and is connected to a very large system. The terminal voltage is 1.0 p.u. and the generator is supplying to the system a current of 0.9 p.u. at 0.85 p.f. (lag). Determine: 1.1 The magnitude and angle of the internal voltage, E; (4) To determine the magnitude and angle of the internal voltage, E, we can use the equation: E = V + I*Xs Where: V = terminal voltage = 1...

OCR Biology PASSED Exam Questions and CORRECT Answers Allele - Ans Different forms of a gene Loci - Ans Location of a gene on a chromosome log phase - Ans The period of exponential growth of bacterial population. lag phase - Ans "flat" period of adjustment, enlargement; little growth interspecific competition - Ans competition between members of different species What molecules travel by diffusion - Ans Small non-polar molecules

REHS Study Questions with All Correct Answers Any living thing that is too small to see without the aid of a microscope is called a _____. - Answer-microorganism Yeasts and molds are two types of _____ that may be found in foods. - Answer-fungi TRUE OR FALSE: Some bacteria have the ability to form spores, which are extremely resistant to heat, cold, and chemical agents. - Answer-True If food is handled properly, bacteria are kept in the _____ phase and not allowed to grow. - Answer-...

Certified Professional Food Safety (CPFS) Exam with 100% correct Answers Four phases of bacterial presence in food - CORRECT ANSWER-1. Lag Phase, 2. Log Phase, 3. Stationary Phase, 4. Death Phase Log phase - CORRECT ANSWER-Most essential phase of bacterial presence in food due to the fastest increase in populations Lag phase - CORRECT ANSWER-Time/temp play an important role in keeping bacteria in this phase (where numbers are less dangerous and growth is slowed) Norwalk virus - CORREC...

Binary Fission Most common form of bacterial reproduction Binary fission 4 Basic steps 1. Growth of cell size and increase in cell components 2. Replication of DNA 3. Division of Cytoplasm (cytokinesis) 4. Septum formation and division of daughter cells Fstz 1. Cytokinesis is directed by this protein 2. Assembles Z ring to form (Divisome) What activates the production of a peptidoglycan and septum? Divisome Generation (Doubling Time) Time takes to double population through one round of binar...

What is the most common cause for bacterial meningitis in children under five years of age? correct answer: Haemophilus influenza type B How is giardiasis usually transmitted to others? correct answer: person-to-person transfer of cysts from the feces of the infected individual Which of the following duties of state and local health agencies is intended to ensure that the public's health and welfare are protected? correct answer: Regulatory responsibilities What is a measure of the ...

Binary Fission Correct Answer Cell division in bacteria in which one cell divides into two cells Why do bacterial cells not undergo mitosis and meiosis? Correct Answer 1) Prokaryotic cells do not possess the machinery to produce spindle fibers and therefore cannot move chromosomes around in the cell 2) Replication of DNA in a prokaryote does not occur in one phase, but instead occurs continuously 3) Most bacteria have only one circular chromosome that is attached to the cell membrane Bac...

What is the most common cause for bacterial meningitis in children under five years of age? correct answer: Haemophilus influenza type B How is giardiasis usually transmitted to others? correct answer: person-to-person transfer of cysts from the feces of the infected individual Which of the following duties of state and local health agencies is intended to ensure that the public's health and welfare are protected? correct answer: Regulatory responsibilities What is a measure of the ...

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...