What was the purpose of leaving the cover on one set of agar plates? How did the growth on these plates differ from the growth on the uncovered plates that were exposed to UV light for the same amount of time?

Q: If a culture had 4 cells to begin with and has a generation time of 60 minutes, how long would it…

A: "Microbiology" is the study of microorganisms and associated topics. Microbiology has gone a long…

Q: What is the stain responsible for staining the vegetative part of this stained specimen?

A: Microbiology is the study of microorganism. The organisms that cannot be seen through naked eyes are…

Q: Lid of petri dish was left on bench top for a few minutes after pouring of sterile medium. Effect:…

A: Microbiology is the study of microorganisms that are invisible to the naked eye. The microorganisms…

Q: How would light shone on one side of the column influence the growth of microorganisms?

A: Different microbes have different growth requirements.  It can be minerals , temperature,  ph ,…

Q: In what instances would the pour plate method be more appropriate than the spread plat method?

A: Pour plate method is a technique that used to enumerate the number of viable cells in a sample.…

Q: How might culture age affect the results of a spore stain? O If the bacterial culture is too young,…

A: Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. The…

Q: Some exconjugants did not grow on minimal medium. On what medium would they grow?

A: Exconjugants can be described as bacterial cells, which separates following the conjugation. A…

Q: How does bacteria grow on agar plates?

A: Bacteria are the most primitive organisms on Earth. They can survive in most extreme environments as…

Q: Can you tell IF the pasteurization process is working in this milk producing plant? How can you…

A: Pasteurization is a process in which milk or milk product is heated to a certain temperature for a…

Q: 1.Procedure for celloidin embedding ? 2.Procedure for vacuum embedding?  3.Procedure for epoxy…

A: 1.Procedure for celloidin embedding Celloidin is utilized in arrangement, generally in a 1:1…

Q: If a bacterial culture is started with 50 cells, what will be the cell number after four…

A: Cultured bacteria are any bacteria that grow in the lab by the microbiologist using the required or…

Q: When we grow bacteria on TSA plates for 5 days, we see mostly vegetative cells. Why?

A: TSA is a nutrient media used for culturing bacteria. The media provides the amino acids and other…

Q: 1. Cell shape and arrangement in A? 2. Gram stain reaction in A? 3. Cell shape and arrangement in…

A: staining is the technique to view the bacterial cells in a smear of inoculum. Gram staining is the…

Q: Do Gram-negative bacteria grow on PEA agar? If not, what prevents their growth?

A: ANSWER;-

Q: Why after a certain period the growth rate of the culture decreases until growth stops?

A: Warmth, dampness, pH levels and oxygen levels are the four major physical and chemical components…

Q: Does temperature affect the rate at which mould grows?

A: The moulds are the type of fungi. They are multicellular microorganisms because they have many…

Q: Why is heat an effective sterilizing agent?

A: Heat Energy : It is a form of energy which takes place by the movement of the minute particles…

Q: When conducting the pGLO lab none of my plates developed growth. Not even the plates in which we…

A: The pGLO plasmid is used to produce the genetically engineered organism because it acts as a vector…

Q: What is the difference between streak plate method and spread plate technique?

A: Answer of the question given below...

Q: PART B Re-watch the video and explain why the following steps are necessary: • Why use tweezers to…

A: Introduction  Antibiotics are antimicrobial substances that are effective against microorganisms.…

Q: What is being done to increase the availability of microscopes in very poor countries?

A: Microscopes are the instruments which are used to examine the objects that are not visible by the…

Q: How would a change in the temperature at which something was incubated affect the amount of mold…

A: The differential growth patterns of organisms are due to the temperature sensitivity of the enzymes.…

Q: Why did the soap have to “cure” in the molds?

A: Fats and oils are triglycerides having a glycerol backbone with all the hydroxyl groups esterified…

Q: PART B Re-watch the video and explain why the following steps are necessary: Why use tweezers to put…

A: Please note as per the site regulations, external links are not watched. Hence, part A cannot be…

Q: How is agar in the petri dish prepared to grow the bacterial specimen? explain in your own words.

A: Agar is a polymer made up of subunits of sugar galactose and is a component of cell walls of several…

Q: Why is plate count more sensitive than a microscopic count?

A: Microorganisms such as bacteria are cultured artificially in laboratories, in order to study their…

Q: Why can't you see the bacteria when you first swab a plate

A: Bacteria are one-celled organisms that make up a vast group. They can dwell in a variety of…

Q: Why does fixation of the positive dye help bacteria stick to the slides?

A: Dyes in microbiology are for staining cells; they are used based on the chemical properties and the…

Q: Identify the texture, transparency, color, colony size, form, margin and elevation of the two…

A: A "colony" is a collection of bacteria, fungus, and other microorganisms cultured on solid agar…

Q: What is the tissue sample pointed in this photo? Explain you answer? *

A: Answer :- The pointed sample is the liver sinusoidal endothelial tissue.  The one of tissue of liver…

Q: Why was the calcium chloride, bacteria, plasmid mixture incubated on ice and not at room…

A: The method of gene transfer in which rDNA is inserted directly into the host cell is called direct…

Q: A 50 ul sample of Euglena is counted at a total magnification of 100X. There were 80 Euglena.…

A: Euglena is a genus of single-cell flagellate organism belonging to the eukaryotes.

Q: Taking microbial cells out of a stationary phase culture and putting them into a fresh, sterile…

A: Growth in higher organisms refers to a rise in size and volume, whereas growth in bacteria refers to…

Q: What is the main advantage of using the slide culture technique for identifying molds?

A: Side Culture - It is a rapid method of preparing fungal colonies for examination and identification.…

Q: Please indicate whether you expect growth or no growth. (Each cell is worth 0.25) Tetracycline No…

A: Antibiotic resistance is a normal part of life. Antibiotic resistance, on the other hand, is driven…

Q: What process would explain why the dyes spread through the agar?

A: Agar -- Agar is polymer and mixture of polysaccharides obtained from the cell wall of red algae .…

Q: what solvent was used in making the slime

A: In the winter of 1976, most people credit the Mattel Toy Company as the originator of slime when it…

Q: What are the factors that have affected the growth of mold in your bread experiment?

A: Introduction Bread is a perfect environment for microscopic fungi known as mold to grow, The purpose…

Q: Colonies have grown in a nutrient agar plate. However, it did not grow along the lines of streaking.…

A: Streaking method This method is used to produce isolated colonies of bacteria. This helps in…

Q: Hand washing experiment using nutrient agar.

A: Nutrient agar is a special food used to grow bacteria in the laboratory. It contains everything…

Q: What type of agar would you use to grow gram negative bacteria

A: Gram-negative bacteria are the bacteria that do not consist of the crystal violet stain and they are…

Q: What is agar and what makes it the best agent for making culture media? explain

A: Microbiology is the branch of science which deals the study of different microorganisms such as…

Q: How is brick weather resistant?

A: Brick is an excellent temperature regulator due to its thermal mass. The solid wall of the brick…

Q: Why are agar plates incubated upside down?

A: The Petri dish has existed for over a decade, whereas simple, cell-growing equipment remains…

Q: How would changing the type of bread (fresh from a bakery, no preservatives versus prepackaged with…

A: Preservatives:It is a substance that is used to protect the food products, wood, and other…

Q: How many colonies are present in this plate?

A: Microbiology is the study of microorganisms and associated topics. Microbiology has gone a long way…

Q: Should one be concerned to find bacteria on the skin? How about molds? Explain.

A: Human beings have an enormous number of microorganisms that are present in the external as well as…

Q: Why is it easier for microorganisms to grown on plastic surface rather than wood?

A: Answer- Wood does have natural antibacterial properties. The organism of bacterium like- Ideonell…

Q: Write the procedure for resin embedding

A: Answer: EMBEDDING = It is the process of embed a tissue for fine and regular sectioned, the most…

Q: What was the direction of centrifugation (which fractions correspond to the bottom of the centrifuge…

A: Centrifugal force : centrifugal force is the force that applies on a particle moving in a circular…

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.