1. The physical factor influencing water entry into and exit from cell interior resulting in microbial cell distention or shrinkage is a.Osmotic pressure b.Hydrostatic pressure c.Radiation d.Temperature     2. The following is/are true about plate count EXCEPT a.A plate count is a count of viable or live cells b.Is based on the principle that viable cells replicate and give rise to visible colonies on plates incubated under optimum conditions c.Is based on the assumption that only one cell always lands on a particular spot in the plate and gives rise to one colony d.None of the above

Q: Explain why a good, healthy growth of bacteria in broth can clear, as if by magic, and all the…

A: The cycle of infection is a model that describes how the host-pathogen interactions change during…

Q: 2. If a bacterium is Gram positive, what can you conclude?

A: Answer: Bacteria : These are the unicellular prokaryotes which cannot be seen through by our naked…

Q: You will be visualizing fluorescently labelled clathrin in this lab. How is the clathrin labelled…

A: Clathrin is a protein that plays a major role in the formation of coated vesicle . this term  was…

Q: Gram-positive (+) and gram-negative (-) bacteria are characterized by differences in a. the cell…

A: Answer is c.) the cell wall: Gram + have a thick layer of peptidoglycan.  Gram - have an outer…

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Q: Cell membrane proteins are determined by  A. Polymerase chain reaction (PCR) B. Thin layer…

A: The biological membrane mainly consists of a lipid bilayer and protein. They form an essential…

Q: You collected 1000 mL of river water from the stream running through campus. You prepared dilutions…

A: Introduction  A dense solution can be made into a more useful concentration by performing a series…

Q: 1. Which of the following is a type of selective debridement? A. epiboly B. autolytic C.…

A: The first question is asking about the types of selective debridement. Selective debridement refers…

Q: The following is/are true about plate count EXCEPT a.   A plate count is a count of viable or live…

A: The following is/are true about plate count EXCEPT a. A plate count is a count of viable or live…

Q: One of the biggest drawbacks of cell culture is the amount of time and materials required to produce…

A: Answer :- By and large, the most widely recognized issues incorporate strange development designs or…

Q: The colonies growing on the surface of solid media represent: Select one: a. A group of different…

A: The CFU/ml are often calculated using the formula:cfu/ml = (no. of colonies x dilution factor) /…

Q: N. meningitidis counters the body’s defenses with a. IgA protease. b. a capsule. c. endospore…

A: Neisseria meningitidis is a Gram-negative and non-endospore-forming bacterial strain. It is a…

Q: Question 6. What color of E. coli colonies do you expect to have after plating transformed cells of…

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Q: in 5 hours, your bacterial culture went from a concentration of ~105 CFU/mL to ~1.6 x 106 CFU/mL,…

A: n=1.6x106 CFU/ml N=(no of cells at the beginning )=105 CFU/ml n=Nx2x x=no. of generation…

Q: E. coli a gram negative bacteria have a flagella orientation covering over the entire bacterial…

A: Flagella is a hair-like feature that aids cell movement.

Q: Gram negative bacteria lose crystal violet colour after alcohol treatment because of: Select one: a.…

A: Gram staining is a technique used to differentiate two large groups of bacteria based on their…

Q: Explain the tenets of Cell Theory Describe how microscopy led to the Germ Theory of infectious…

A: Cell Theory: A basic idea in biology, cell theory has completely changed how we view life. It puts…

Q: 10. The diagrams below represent two cells, X and Y. * -A B C Cell X Cell Y Identify one process…

A:

Q: 3. (a) (b) What are the different methods of cell lysis? Discuss in detail. In Streptomyces…

A: 3.a)Cell lysis is the process of breaking down the cell in order to extract desired product which is…

Q: You have aseptically inoculated an unknown organism on a blood agar plate. You return 48 hours later…

A: The unknown organism on a blood Agar plate would cause hemolysis which is the destruction of red…

Q: is a culture in which the Question 2. cells have undergone genetic modifications that allow them to…

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Q: Identify the stages of bacterial growth Identify the stages of bacterial growth

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Q: particular bacterium requires techoic  acid in its medium in order to grow. What would the bacterium…

A: B. cell wall

Q: 12Bacterial growth can be measured a.   Directly by counting bacterial cells   b.   Indirectly…

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Q: The bacteria capable of producing dormant bodies devoid of active metabolism, but carry all the…

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Q: Streptococcus pyogenes a gram-positive beta hemolytic streptococcus once streaked in Chocolate Agar…

A: Streptococcus pyogenes  It is a pathogenic bacteria that that requires blood agar media to grow.

Q: What is the purpose of diluting a culture by making "quadrant streaks" (or "streak plating")…

A: Quadrant streak method is used for isolating the bacteria based on their differences. Four Agar…

Q: 1.) (a) assuming that a sample of muscle tissue infected with trichina cysts has been sectioned at…

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Q: Some antibiotics show no zone of inhibition against the microbe. How is this possible? Explain how…

A: The zone of inhibition is basically the circular area around the spot of antibiotic in which the…

Q: Which of the following virulence factors enable(s) bacteria to avoid phagocytosis by white blood…

A:

Q: A microbe causing a bloodstream infection is likely all of the following except

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Q: 1.What types of damage to human tissues can result from prolonged exposures to UV radiation? What…

A: UV radiation is ultraviolet radiation which is a electromagnetic radiation with shorter wavelength…

Q: Starting with a single bacterial cell at time zero, assuming binary fission every 20 minutes, how…

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Q: Features of continuous cell culture include the following, except ________ . a.addition of product…

A: Introduction: A single cell type that may be serially multiplied in culture for a set number of cell…

Q: Which of the following are features of Flagella?   A. Found on the cell surface   B. Necessary…

A: Flagella is a helical structure which comprises of flagellin protein.Structure of flagella is…

Q: A persister cell is an individual bacterial cell that can survive: A. In an autoclave B. An…

A: Persisters are a unique variant of cells that exhibit a state of dormancy while exposed to…

Q: 48. The arrow points to a Listeria monocytogenes cell moving within the cytoplasm of an intestinal…

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Q: Antibiotic Zone of Inhibition A 15 mm B O mm 7 mm 15 mm a. Which antibiotic was most effective…

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Microbial Physiology

Microbial physiology is the branch of microbiology that is associated with studying the physiology of fungi, bacteria, and viruses. It is an important field of science concerning functional genomics and metabolic engineering.

Chemotaxis

The organism’s movement in a particular direction as a response to certain chemicals that are available in the environment is defined as chemotaxis. In brief, it can be defined as the occurrence of an organism’s movement in response to a certain chemical stimulus.