Which of the following is false about a colony? O A colony is a population of cells formed from a single bacterlal cell or a colony forming unit. O A colony is pure and produced from one bacterial cell. Pure colonies are isolated by streaking. O A colony consist of billions of bacterial cells. O A colony is a mixture of different bacterial cells.

Q: The presence of a specific plasmid in a bacterial cell may be determined if the plasmid __________.…

A: The Answer is given below.

Q: Approximately how many bacterial colonies are present on plate B?

A: Bacteria are small, microscopic, and unicellular organisms that are found almost everywhere on the…

Q: A particular type of inclusion body that is used to orient bacteria in three- dimensional space in a…

A: Inclusion bodies are are proteins which are aggregated and present as particles in the bacteria.…

Q: 120,000 100,000 80,000 60,000 40,000 20,000 15 20 25 30 35 40 45 50 Time (minutes) 0 5 10 55 60 65…

A: Bacteria are prokaryotic organisms found almost everywhere from deep-sea vents to space, from…

Q: You are attempting to grow a culture of Escherichia coli to use in an experiment, and you need the…

A: Doubling time of a bacterial cell can be defined as the growth pattern in which the bacteria attends…

Q: The three shapes of bacteria are: and O rod-shaped oval round crooked O spiral

A: Bacteria can take one of the basic shapes: spherical (cocci), Cocci can be single or in groups of…

Q: In a plate count, 1 mL of culture is spread on a plate and incubated for 24 hours. 250 colonies are…

A: Given,number of colonies in a 1mL of culture = 250. Also,given that this given solution is 100 times…

Q: You have a culture that has 5 X103 cfu/ml of bacteria in it. You perform a serial dilution by adding…

A: In microbiology and bacteriology, the technique of serial dilution is a fundamental method used to…

Q: In terms of microbial pathogenicity, molecular Koch's postulates are a set of experimental criteria…

A: Koch's postulates are four criteria that were designed to establish the causal relationship between…

Q: James inoculated a species of bacteria into KIA media and realized that it has a yellow butt and a…

A: This question is about identification of lactose non fermenting strain which is to be grown in…

Q: It took 25 minutes to kill all the bacteria in a test tube at a temperature of 135 degrees Celsius.…

A: An autoclave is a device that uses high pressure and temperature to sterilize equipment and…

Q: i am responsible for detrmining how many bacteria are in a 100ml sample of milk. 1 pour 1 ml of my…

A: The bacterial divides by the binary fission process. By observing the number of colonies on the agar…

Q: The number of bacteria in a culture every 2 hours and 30 minutes. If the initial number of Bacteria…

A: In the question, we are given: Generation time of bacteria: 2 hours and 30 min.  Initial number of…

Q: Which of the following would never be an episome? A prophage An F plasmid A provirus A virulent…

A: Episome is a genetic material that can exist independently as well as can be integrated in the main…

Q: You should observe obvious decrease in the number of colonies through the dilutions. If you observe…

A: It is well known that bacterial cultures and other samples containing many cells frequently make it…

Q: You decide to knock-out URA3 and replace it with NeoR. What type of media will you plate your yeast…

A: * knockout with URA3 and replace it with NeoR. * URA3 URA3 is a gene on chromosome V present in…

Q: Below are the results of streak for isolations of Bacterium 1 and Bacterium 2 before and after they…

A: Pure culture :- Pure culture is one that has only one kind of bacterial population which earlier…

Q: Which of the following is correct? All bacteria can form endospores O Vegetative cells are inactive…

A: Introduction The endospore is the dormant, protective and non-reproductive structure produced by the…

Q: Name of Organism: Citrobacter freundii Туре of Medium Color Before Incubation Color After (Same for…

A: Citrobacter freundii is a gram-negative bacteria that is rod-shaped and belongs to the bacterial…

Q: Epulopiscium fishelsoni is the largest known bacterium, first discovered by Lev Fishelson, then Linn…

A: Given  Bacterium length = 600um or 6 × 10-4 m Bacterium diameter = 80um or 8 ×10-5 m Radius = D/2 =…

Q: A pilus could be used for all of the following except: Motility Attaching to a surface Conjugation…

A: There are several cellular projections found in bacteria that perform several functions. The major…

Q: Katelyn had been working for Dr. Johnson for a month, and while she had become quite good at…

A: Methicillin-resistant Staphylococcus aureus (MRSA) is a bacterium that causes infections in…

Q: What color is a GRAM NEGATIVE bacteria? purple pink

A: Microscopic, single celled organisms which are found in every environment in millions are known as…

Q: Discuss why you should incubate bacterial plate upside down with the lid at the bottom:

A: Management of the culture plates is important in the microbiology laboratory. It is studied under…

Q: The main difference between a gram-positive and a gram-negative bacteria, is that; a. Gram-positive…

A: The gram staining technique is used to distinguish bacteria into gram positive and gram negative…

Q: Which of the following are true of the above picture? (Select all that apply.) V The bacteria are…

A: Gram-negative bacteria have a thin peptidoglycan layer which fails to retain colour after treatment…

Q: True or False: The Type Strain of a bacterium is the most widely studied strain of a bacterium…

A: A type strain is a well-characterized and widely recognised strain of a microorganism (such as a…

Q: The experiment shown above was designed by Row A B. C D. i Hershey & Chase Hershey & Chase Meselson…

A: In the year 1952, two geneticists- Alfred Hershey and Martha Chase, conducted series of experiments…

Q: A food sample was cooked. The bacterial population in the food decreased from 500,000 cells to 5…

A: A Decimal Reduction Time (D-value) is a term that describes how long it takes to lower a number by…

Q: Which of the following are TRUE when a bacterium engages in conjugation: sex pilus production occurs…

A: Bacterial conjugation is an essential process that allows bacterial cells to exchange genetic…

Q: Which of the following techniques is not used to count bacteria?         Optical density…

A: Bacterial counting can be done by via- (1) Optical density- Optical density of bacteria can be used…

Q: It took a temperature of 135 degrees Celsius to kill all of the bacteria in a test tube in 10…

A: As more and more microbes were discovered and identified to be the cause of various infections or…

Q: expen using disinfectant yielded the following results: Control (no disinfectant) - 220 colonies on…

A: In order to minimize the likelihood of infection, disinfectants are utilized & these are…

Q: Complete the colony morphology for the colonies pictured above: 1.  Form - 2.  Elevation - 3.…

A: The given picture shows the blood agar of gram negative entero-bacteriacea named Morganella morgani.…

Q: Which of the following is correct? All bacteria can form endospores O Vegetative cells are inactive…

A: Staining technique is a method to determining structure of microscopic organism. Staining technique…

Q: How can I solve this equation?

A: Given, Every time the bacteria reproduce, the number doubles. Which means, it represents an…

Q: In the Griffith experiment, why didn't the bacteria from rough colonies harm the mice? Because they…

A: Bacteria like Streptococcus do not have membrane-bounded organelles, can reproduce individually,…

Q: During the process of conjugation between two bacteria, each bacterium transfers some of its DNA…

A: Conjugation is a type of horizontal gene transfer in which genes from one bacterium are transferred…

Q: The first picture is gram stain negative

A: Gram staining is method that is used to categorise the bacteria based on their staining properties.…

Q: Bacterium A Indole H2S Production Motility Bacterium B Appearance of Positive Result Result from…

A: Indole Test: The indole test is a biochemical procedure used to assess a bacterial species' capacity…

Q: Which of the following statement about normal flora is INCORRECT?   Question 3 options: A On…

A: Microbiology is the branch of science which deals with the study of microorganisms and their effects…

Q: which of the choices below is wrong or incorrect about glycocalyx/capsule/slime layer)? O It is the…

A: The glycocalyx exists in bacteria as either a capsule or a slime layer and is located on the apical…

Q: Which of these is NOT a group that we typically use to subdivide the medically important…

A: Bacillus species are rod-shaped, endospore-forming, aerobic or facultatively anaerobic,…

Q: 4. You have a culture of yeast that is at a density of 8x107 cells/mL. You dilute the sample 1:10,…

A: A stock of solution containing any microorganism would be having a large number of microbial cells…

Q: atation that prevents a bacterium from making True False

A: ATP stands for adenosine triphosphate. it carries three phosphate groups. Three phosphate groups are…

Q: In a series of infection experiments, a researcher discovers that the ID50 value for the infectious…

A: Microbes such as most bacteria and most fungi are heterotrophic in nature. They are not capable of…

Microbial Growth

The development of microbial growth is influenced by various natural conditions (both physical and synthetic) like pH, temperature, saltiness, gas focus (O2, CO2, and H2), nutrients, water action, and assimilation. Knowing the distinctive physical and chemical factors that influence the development and endurance of microbial growth in the climate will assist with reinforcing endeavors outfitted towards their control. These lines lessen or diminish their harmful impacts on humankind, creatures, and the climate.