The culture contains no bacteria. Refrigeration slows bacteria growth. Temperature is unrelated to bacterial production rate. Bacteria cannot grow at a temperature of 5°C

Q: The agar turns pink because the enzyme produces which causes a pH change to Ammonia, alkaline OA.…

A: Urease test is performed to check the  organism's ability to produce an enzyme known as exoenzyme.…

Q: student needed to transfer bacteria from a broth culture to an agar plate. Below is the step-by-step…

A: 5. The loop was flamed

Q: Bacillus cereus divides every 30 minutes. You inoculate a culture with 100 After 3 hours, how many…

A: Bacillus cereus is a rod-shaped, gram-positive bacteria. It is a facultative anaerobe. It is a toxin…

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: There are five bacteria in a petri dish and its number triples every minute. How many bacteria are…

A: Bacteria are organisms that are found almost everywhere on earth and are free-living cells that are…

Q: the shape of the bacterial cells for each of the two yogurt bacteria. Be sure to use the terms for…

A: Both streptococcus thermophilus and lactobacillus acidophilus are probiotic Bacteria that are found…

Q: A culture initially has P0 number of bacteria. At t = 1 hour the number of bacteria is measured to…

A: A first order initial value problem is a system of equations of the type  F(t,y,y’)=0 ,  y(t0)=y0 .…

Q: Why is staining a specimen helpful for microbiologists? This is only done for laboratory decoration,…

A: Why is staining a specimen helpful for microbiologist?

Q: In a bacterial culture on an agar plate, what is a zone of inhibition?     An area where the…

A: Microbial culture is a method of multiplying microbial organisms by letting them reproduce in…

Q: A fastidious organism must be grown on what type of medium?a. general-purpose mediumb. differential…

A: Bacteria require appropriate environmental conditions for its growth. Solid or a liquid preparation…

Q: When can gelatin be used in culture media preparation? [Answer in not more than 2 sentences

A: GELATIN: Gelatin, often known as gelatine, is a transparent, colourless, and flavourless culinary…

Q: You are given an unknown bacterial culture and you want to determine if it is resistant to…

A: Antibiotics are chemicals that fight bacterial infections in humans and animals. They work by…

Q: You begin with an overnight culture of approximately 108 organisms/ml and need a concentration of…

A: In an Overnight culture of the bacteria, their growth factor depends upon the type of bacteria we…

Q: You have a culture of cells at a density of 2.7 x 109 cells/mL and you want to plate out 100 cells…

A: We shall be performing a dilution calculation for this question. We know, C1V1 = C2V2 C1 is the…

Q: The number of bacteria in a culture increases rapidly. The table below gives the number N (t) of…

A: Given Values: Number of bacteria at a time (t=0) = 1000 Number of bacteria at a time (t=3.1 hours) =…

Q: Dilute cells from an old culture 1:200 into 5 mL of fresh media. What volume of the old culture…

A: Introduction Dilution is the process of lowering the concentration of a solute in a solution by…

Q: A broth culture is initially inoculated with a single bacterial cell. For the first hour the…

A: * Given that  The bacteria has generation time of 30 minutes. So it takes about thirty minutes to…

Q: The below  photograph shows a Gram-stained slide viewed using a light microscope set at brightfield…

A: Gram's staining is a technique used to distinguish between Gram negative and Gram positive bacteria.…

Q: The Gram Stain Build the gram negative structure

A: Gram stain is a type of stain that is used to identify the structure of bacteria. The stain itself…

Q: neration time of the species is 1 hour, and the microbes are in the exponential (log) hase of…

A: Microorganism that experience exponential growth its number increases according to this equation…

Q: Based on these results, which of the following statements is true regarding the effectiveness of…

A: A disinfectant is a chemical substance or compound that is used to inactivate or destroy the…

Q: Which one of the following is NOT considered a biohazard?            old bacterial cultures slides…

A: Biohazard is defined as any biological substance that can pose or cause a threat and harm to biotic…

Q: Can culture media be sterilized in the hot air sterilizer? Why or why not? (Answer in not more than…

A: Sterilization is defined as a process by which an agent is used to destroy or remove the…

Q: microbiology

A: For to obtain cultures and Sensitivity faster, depends on targeted bacterial strain. The media…

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: The counterstain in the Gram stain is: A basic dye A negative stain A mordant An acid dye Necessary…

A: Staining is a method for enhancing contrast in material, usually on a tiny scale. Histology, as well…

Q: Determine the number of bacterial cells per ml. in the original culture. 1ml 1ml 1ml 1ml 99ml 99ml…

A: Serial dilutions are used to minimize bacterial concentrations to a level necessary for a certain…

Q: A microbiologist has isolated a new strain of bacteria, and is trying to characterize aspects of its…

A: Psychrophilic bacteria are cold loving bacteria that grows and reproduce at lower temperatures…

Q: A loopful of bacteria containing 1000 bacterial cells is inoculated into a nutrient broth and…

A: It is a multiple choice question.

Q: True or False: An isolated bacterial colony supplies cells.to grow "pure culture" of the bacteria.…

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: A bacterial sample collected from a patient is processed using a Gram's stain. After staining, the…

A: Gram stain is a test that looks for bacteria in areas where an infection is suspected, such as the…

Q: List down at least 5 products of industrial microbiology. Also, give info about the organisms and…

A: Industrial microbiology is the branch of biology that deals with the commercial-scale production of…

Q: If the temperature of the incubator were to be increased from 35 to 45°C, how would this affect the…

A: The growth of bacteria is influenced by many physical factors. Temperature is one of the significant…

Q: typical labeled sketch of a bacterial growth curve in batch culture

A: Batch culture is a laboratory culture method in which bacteria has grown in large scale.  Here…

Q: Bacterial cells can form colonies on the following media EXCEPT: Select one: Nutrient broth Agar…

A: The nutrient broth is the liquid nutrient media that lacks the solidifying agent. It is used for…

Q: differential plate enrichment plate selective plate streak plate pour plate

A: Differential plate:  Differential media used to distinguish between two related microbes. It used to…

Q: Why is a Bunsen burner used in the microbiology lab? (select all that apply) The flame is used to…

A: Answer -The flame is used to sterilize the inoculating loop. -The flame kills microorganisms that…

Q: If some cells in your Gram stain are red/pink rods and some are purple cocci, __________.   your…

A: It is a common staining method in microbiology, used to differentiate two large bacterial groups…

Q: Which of the following would typically be the initial indicator of bacteria growing within a blood…

A: Blood agar is one of the commonly used culture methods used for growing micro organisms and growth…

Q: Which of the following prevented an aerotolerant anaerobic, mesophilic and halophilic bacterium from…

A: When the bacteria is aerotolerant, mesophilic and halophilic bacteria, we can stop the contamination…

Q: Which of the following are true regarding UV disinfection? Mark all that apply. Water must be clear,…

A: Electromagnetic spectrum is the large range of light rays containing x rays, gamma rays, visible…

Q: “Salt agar” is a type of ______ medium for culturing some microbes and not others

A: Salt agar encourages the growth of certain bacteria while inhibits others growth in the same medium.…

Q: __________ indicates ________________ in the cell culture.

A: Cell culture is a  primarily techniques in life sciences. This is a common term that is  used for…

Q: Give two reasons for why heat fixing is used?  Adherence of bacterial cells to the slide…

A: Haet fixing is the procedure in gram staining of the bacteria. This has to be done so that the…

Q: Which of the following types of media would be appropriate to use in order to culture a fastidious…

A: Answer:- From all the four above-mentioned medias yeast extract media and nutrient media are…

Q: What is the physical appearance (solid, liquid, semi-solid) of following media:Agar deep tube

A: Bacterial culture media is a kind of growth media in which the required bacteria is  cultured. The…

Q: After the mordant has been added, Gram-positive organisms are stained __________ and Gram-negative…

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

Q: bacterial culture has a concentration of 3.2 x 108 cells /mL. You dilute this culture as follows:…

A: CFUs are a measure of the number of progenitors present in a given population of cells; if an…