Match the description to the correct phase in a standard bacterial growth curv best time to perform Gram stains [Choose ] [ Choose ] phase in which one would see the highest concentration of endospores stationary phase death/decline phase phase in which bacteria are most sensitive to lag phase antibiotics log/exponential stage many bacteria in biofilms are in this phase, I Choose 1

Q: Scopically after the Gram reaction Ammonium oxalate Crystal Gram's iodine Ethyl Alcohol Safranin…

A: Gram Positive: - Colour after treatment of following: - Ammonium Oxalate:- Violet Gram's iodine:-…

Q: Antibiotics should be reduced or eliminated from culture media during cell subculturing. Make it…

A: Subculturing, also known as passaging cells, is the process of removing the media from an old…

Q: A culture of E. coli has a concentration of 5 x 108 cells/mL. How many times do you have to dilute…

A: Given: 1. Number of colonies: 2502. No. of bacteria in culture: 5 X 108 3. Volume plated: 0.1 ml 4.…

Q: What is an endospore?

A: There are various means which is used to kill the bacteria and other organisms. The methods used can…

Q: bacterium is grown in an environment with tryptophan added to the medium.  Describe how the bacteria…

A: Tryptopham  is an amino acid and is a necessary ingredient to  synthesise its protein. There are…

Q: When you interpret a Gram-stained smear, you should also describe the morphology (shape) of the…

A: Bacteria These are prokaryotic organisms which kack membrane bound organelles. Through the technique…

Q: Clostridium Botulinum Physical caracteristics Shape Arrangement Gram status? Acid fast ?…

A: Physical Characteristics Clostridium Botulinum Shape  Rod shape Arrangement Arranged as…

Q: The light photomicrograph (see image below) shows a single type of bacterial cell treated with…

A: Magnification = length of image ÷ actual length of organism

Q: As part of an experiment where absorbance values are measured using a spectrophotometer, you are…

A: The bacteria growth uses mitotic cell divisions. The bacterial population grows until the nutrients…

Q: A water sample is boiled for 20 minutes and plated onto nutrient agar. Growth is observed 24 hours…

A: Bacteria belongs to the kingdom called monera and is a unicellular organism. They can survive in…

Q: Peptidoglycan layer of Gram-positive bacteria is thinner compared to Gram-negative bacteria. O True…

A: ANSWER;- False Explain;- Gram-negative bacteria are encircled by a thin peptidoglycan cell divider,…

Q: What specifically causes colonies of lactose fermenters to be pink-red on MacConkey agar?

A: MacConkey agar is a selective media and a differential media that is used for isolation and…

Q: Which type of hemolysis characterizes Streptococcus pyogenes, the bacterium that causes strep…

A: BASIC INFORMATION BACTERIA  It is one of the type of biological cell. They belong to prokaryotic…

Q: biofilm-producing bacteria

A: Disclaimer: Kindly repost for other questions. As per the guidelines we are supposed to answer only…

Q: Match the description to the correct phase in a standard bacterial growth curve. best time to…

A: The proliferation of bacteria into daughter cells is referred to as bacterial growth. The growth of…

Q: In the Gram stain, gram-positive bacteria are dark purple for all the following reasons EXCEPT:…

A: Organisms can be provisionally identified by growing them on medium and looking at their shape and…

Q: DRAW IT A bacterial culture was in log phase in the following figure. At time x, an antibacterial…

A: Bacteriostatic compounds stop the growth of bacteria but do not kill them. So, the number of cells…

Q: Why do you think an infection from gram-negative bacteria can be more diff treat with drugs than a…

A: There are two types of bacteria depending upon their cell wall. Gram positive bacteria are known as…

Q: How is L. pneumophila acquired?

A: The L. pneumophila is basically a facultative parasite found in intracellular environment as primary…

Q: Why are only the colonies growing close to the mold inhibited?

A: Bacteria are unicellular, prokaryotic organism which are devoid of membrane bound organelles and a…

Q: Bacterial growth depends on many environmental factors, including the temperature of the…

A: The growth of microorganisms is indicated by an increase in the number of microbial cells in the…

Q: The picture shows bacteria (Escherichia coli) under a microscope Do you bacterial growth or no (…

A: Escherichia is a gram-negative bacterium, which under the microscope is shaped like a rod with a…

Q: A. iMAGE 1 1. What is a special characteristic of the microorganism shown? CHOICES: A.It shows…

A: As per answering guidelines, we can answer only one question with a maximum of three subparts. So…

Q: . iMAGE 1 1. What is a special characteristic of the microorganism shown? CHOICES: A.It shows…

A: Hi! Since you posted many questions, we will be answering the first for you. Please post the other…

Q: chemical(s) best at inhibiting both Gram- negative and Gram-positive bacteria [Choose ] [Choose ]…

A: Hi! Thanks for your question. As you have posted multiple questions and have not mentioned which one…

Q: In which phase would you expect to find the most endospores in a bacillus cell culture?   pick one…

A: Logistic curve: a sigmoid curve that grows exponentially for small values of the variable and…

Q: Match the descriptions to the terms. There are 4 descriptions to match. You can use a choice more…

A: Bacteria are microbes that are everywhere.

Q: When grown in a batch culture, a Bacillus sp. produces an antibiotic only during the stationary…

A: The microbial population exhibit different growth trends based on the type of medium in which they…

Q: What type of media are culture medium 1 and culture medium 2? And its difference to each other?

A: Differential media allows growth of different species. This media is used to differentiate between…

Q: A bacterium has a generation time of 30 minutes. You transfer cells from an exponentially growing…

A: Bacteria are unicellular and prokaryotic organisms that live in wide variety of environments. It…

Q: Growth of an E. coli bacteria in batch culture is observed. The bacteria are fed with 0.5 g / L…

A: Bacteria are microorganisms that grow very fast. They almost double every 20 to 30 minutes.…

Q: m Surface Opacity Cell color Cell shape Cell Grouping  G+ or G-

A:

Q: Conditions for an average autoclave run are and bacterial endospores. O 21 degrees C/5 psi/5…

A: Autoclaving is the means of wet mode of sterilization. Autoclaves use high temperature combined with…

Q: Gram-positive (+) bacteria with a thin peptidoglycan layer traps the crystal violet stain. Select…

A: Gram staining is also known as Gram's method is a staining method for identifying and separating…

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: The following is an endospore staining. What do we call the pinkish-red cells in t picture? -L y a)…

A: Endospores are metabolically inactive cells that are  produced by bacterial cells under unfavourable…

Q: Match the bacterium to the correct description. + Pseudomonas aeruginosa A. Gram negative rod. Known…

A: Gram positive bacteria are the bacteria which take up gram stain as they have thick walls having…

Q: A lab technician is working with a bacterium in pure culture (in 5 ml of liquid media in a test…

A: Mesophiles  Mesophile bacteria are those bacteria which grow in optimum range of temparature not to…

Q: Directions: Please provide 3-4 sentences giving a brief description of how your experiment could be…

A: Yeasts are able to grow in foods with a low pH (5.0 or lower) and in the presence of sugars, organic…

Q: What color would the bacterial cells have when viewed microscopically after the following treatment?…

A:

Q: am-positive (+) bacteria with a thin peptidoglycan layer traps the crystal violet stain. Select…

A: Bacteria are the single celled microscopic organisms. These are can not be seen through the nalked…

Q: mycobacterium tuberculosis Gram staining status OR acid-fast stain cell wall description. Explain…

A: The etiologic agent of tuberculosis in humans is Mycobacterium tuberculosis. The bacterium's only…

Q: Gram Stain Gram Reaction (Gram- positive or Gram- negative): Cellular morphology (shape &…

A: Bacteria are unicellular and prokaryotic organisms that live in a wide variety of environments. It…

Q: Examine the image below. The bacteria in this image have been treated with gram straining procedure.…

A: The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring…

Q: A pure culture of an unknown bacterium was streaked onto plates of a variety of media. You notice…

A: A culture medium is a medium that is used to provide support to the growing microorganisms. This…

Q: Correctly identify the steps and outcomes in the process of screening for a nutritional mutant of a…

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Q: Cell Main cell 02 Acid fast Endospore Gram shape arrangement requirements Bacterium reaction…

A: Bacteria vary in their cell morphology, arrangement, oxygen requirements and stain differently in…

Q: Which of the following reports bacteria counts as colony-forming units? Turbidity Most probable…

A: Bacteria are microscopic unicellular organisms that can be grown in culture for the benefit of the…

Q: Bacterial cells are most likely to be affected by antibiotics when they are in this phase of the…

A: Bacterial growth is an orderly increase in the quantity of cellular constituents (e. cell mass) and…

Q: The culture contains no bacteria. Refrigeration slows bacteria growth. Temperature is unrelated to…

A: Solid or a liquid preparation that contains all the necessary components required for growth is…

Microbial Isolation

Isolation of the microorganisms in microbiology is the process of developing a pure culture by separating one species of microbe from a mixture of many other species. A pure culture is a culture that contains only one species of microbe.