Lag phase Study guides, Class notes & Summaries

BIOL 2460 Chapter 9: Microbial Growth Graded A+ Most common form of bacterial reproduction Binary fission 4 Basic Steps of Binary Fission 1. Growth of cell size and increase in cell components 2. Replication of DNA/chromosomes 3. Division of cytoplasm (cytokinesis) 4. Septum formation and division of daughter cells Cytokinesis is directed by the ___________ protein. FtsZ Where is the Z ring assembled during binary fission? On the cytoplasmic membrane Divisome activates the...

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...

OpenStax Microbiology Test Bank- Chapter 9: Review Bacteria most commonly reproduce using which of the following methods? A. binary fission* B. budding C. meiosis D. mitosis Difficulty: Easy ASM Standard: N/A 1. Which structure separates new daughter cells in binary fission? A. the crescent B. the division septum* C. the FtsZ D. the spindle apparatus Difficulty: Easy ASM Standard: N/A 2. Which of the following is another term for generation time? A. doubling time* B. growth rate...

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

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...

In which growth phase is a bacterial culture MOST susceptible to a chemotherapeutic agent? Hint: It will take some critical thinking to answer this one. Think about what is happening in each of the growth phases (bacterial growth curve) and how antibiotics work. stationary phase log phase lag phase death phase - log phase Microorganisms are most susceptible to antibiotics when they are rapidly metabolizing and growing. Mueller Hinton plates are always prepared at a standard thickness of...

Define the term Microbiology - The study of microorganisms and their relationships to the environment, humans and animals in disease Name the 5 classifications of microorganisms - Bacteria, Virus, Mycobacterium, Fungi, Parasites Blood agar is the most commonly used media in the clinical laboratory. What type of media is blood agar? - Enriched media, Differential media (detection of Beta-hemolytic organisms) List some agars that are generally used in stool cultures and what type...

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...

Four phases of bacterial presence in food - Answer 1. Lag Phase, 2. Log Phase, 3. Stationary Phase, 4. Death Phase Log phase - Answer Most essential phase of bacterial presence in food due to the fastest increase in populations Lag phase - Answer Time/temp play an important role in keeping bacteria in this phase (where numbers are less dangerous and growth is slowed) Norwalk virus - Answer Rarely a pathogen associated with shellfish Hepatitis A virus (HAV) and Vibrio spp (a b...