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: Which of the following statement is true? A. Gram negative bacteria have thicker…

A: Option (A) -  This is a incorrect statement.  Gram negative bacteria have a thinner peptidoglycan…

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: 1. What is the purpose of preparing a cell culture? 2. Differentiate the general types of cell…

A: Cell culture is a type of monoculture in which we are determined to get only one cell type in…

Q: 2. The nucleic acid of a bacteriophage enters the cell through; a. Injection b. Fusion c.…

A: Bacteriophage Bacteriophages are viruses that can infect and destroy bacteria. Obligate…

Q: 5. The favorable growing conditions of a microbe is at 37°C and pH 6. Which of the following…

A: Bacteria are classified into various types based on the structure of the cell, growth temperature,…

Q: Gamma-hemolysis on a blood agar plate would likely appear: Select one: a. As no change in the…

A: Hemolysis is referred to as the breakdown of red blood cells. Gamma hemolysis is a type of hemolysis…

Q: The catalase test determines the presence of the catalase enzyme. a. Describe the function of the…

A: 3. In microbiology, catalase test is a very important test to identify bacteria. This test helps to…

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: Which of the following is true of nanometer a a nanometer is about the size of a common bacterial…

A: All scientists must communicate in the same language, and one of these universal communication tools…

Q: Why do we usually dilute cells before counting them in a hemocytometer?

A: According to guidelines we have to answer the first question only. so please kindly post the…

Q: A narrow spectrum antibiotic against Gram –‘s might target the ____________ whereas narrow spectrum…

A: In Gram positive bacteria, gram stain retains long time after wash but in gram negetive bacteria…

Q: 4. A chemical sterilization procedure is found to destroy the indicator organism B. şubtilus with…

A: Sterilization is the process which involves destruction of all microorganisms (bacteria, fungi,…

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

A: Transformation is a process by which foreign DNA is introduced into a cell, resulting in a change in…

Q: A cell is 25 μm wide when viewed at 1,000× magnification. Thismeasurement can also be written…

A: 1,000× magnification means that to the naked eye, the image would appear 1000 times larger than it…

Q: 5 You inoculate single white colonies into medium plus ampicillin, and the next day you isolate the…

A: Plasmids are circular DNA molecules that have the ability to replicate independently of the host…

Q: gram stain, if the bacteris are purple in color, then its

A: Gram staining- This test differentiate the bacteria into Gram Positive and Gram Negative Bacteria,…

Q: A. AG for the two reactions is different B. Trypsin is a protein, and elastase is not D. One of the…

A: DNA: DNA is an organic molecule that includes genetic information as well as instructions for…

Q: following, Group of answer choices Clotrimazole inhibits cholesterol synthesis in fungal membrane…

A: False statement is chlotrimazole inhibits cholestrol synthesis in fungal membrane.

Q: 1. Microorganisms are usually measured using in nanometer and microns. Viruses are about only 0.004…

A: The study of tiny living creatures such as bacteria, viruses, fungus, algae, and protozoa is known…

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: What of the following types of culture media allows the growth of specific microorganisms and…

A: Culture media are solutions that provide all the nutritional and physical growth factors required…

Q: D. nitrogen fixation E. photosynthesis 18. What term best describes the following reaction carried…

A: NO3 is nitrate and NO2 is nitrite. So in the reaction mentioned above nitrate is being converted…

Q: Which of the following pairs are not correctly matched? Select one: a. Transient flora - removed…

A: Good hand hygiene plays important role in preventing infection transmission and protects from…

Q: 1.You are given an unlabeled agar plate that is reddish in color. You do not know if it is MSA or…

A: The study of all living creatures that are very small, cant be seen by the naked eye is known as…

Q: pH indicator

A: If an organism can hydrolyse esculin in the presence of bile, it gives positive bile esculin test. A…

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

A: The four phases of bacterial growth are- a) Lag Phase b) Log Phase c) Stationary Phase d) Death or…

Q: Bacteria may be Gram + or Gram - due to their difference in staining. This stain is significant to…

A: Gram staining is one of the most common methods of staining used to classify bacterial species into…

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

A: Introduction The bacterial cell cycle entails the replication of DNA and the partitioning of…

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: On your groupmate's DCC plate, you can see mucoid bacterial colonies with clearings underneath. What…

A: Principle of Deoxycholate Agar: - It has dipotassium phsophate as a buffer, so  Lactose fermenters…

Q: 1. In the human body, there are approximately - trillion human cells and trillion bacterial cells.…

A: Cells are the basic structural and functional unit of life. They are the building blocks of all…

Q: Placing bacteria onto the medium in a Petri dish is known as

A: Bacteria are the unicellular prokaryotic organism. Bacteria belongs to the kingdom Monera. Bacterias…

Q: Describe the microscopic morphology and behavior of each species observed with a wet mount (A.…

A: E.gracilis: *E.gracilis under the light microscope looks like unicellular and are moving across…

Q: Bacterial growth occurs sexually through binary fission true or false

A: Bacteria are prokaryotes characterised by the absence of nucleus and membrane bound organelles.

Q: A research study investigates the synthesis of filaggrin-containing granules in skin biopsies from…

A: Filaggrin-containing granules are synthesized in the stratum granulosum, which is indicated as B.

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

A: Certain bacteria can lead to bloodstream infections causing septicemia. It may use an external route…

Q: 5. The favorable growing conditions of a microbe is at 37°C and pH 6. Which of the following…

A: Microbes are the minute single-celled organisms that are present all around us and are not visible…

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

A: Antibiotic sensitivity test is a test is used to evaluate that which antibiotic is best for stopping…

Q: 39. Cell harvesting includes the following, EXCEPT: А. Application of colchicine В. Spreading of…

A: We know that removing cells from culture surfaces and separating them from the culture media in cell…

Q: 1. While playing saxophone . Sometimes the reed can get bacteria or fungus growing on it. What…

A: SAXOPHONE is an instrument and it is made up of brass and it is played with the mouth piece.it is…

Q: What are the basic differences from a primary cell culture, cell line and a cell strain? 2.…

A: Answer 1: - Primary cell culture is defined as: - an ex vivo culture of cells freshly obtained from…

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.