You applied hydrogen peroxide to a bacterial culture growing on a Petri dish and obtained bubbles within 10 seconds of application. What test did you perform? O Catalase O Oxidase O Triple Sugar Iron agar O MacConkey agar

Q: One ml of a water sample was placed in a Petri dish with melted agar. After incubation, 129 colonies…

A: A colony-forming unit, or CFU, is a measurement of the concentration of microorganisms in a test…

Q: How would you prepare a 10-7dilution from a culture? Each of your dilution tubes cannot hold more…

A: Dilution is the process of lowering a solute's concentration in a solution, typically by mixing it…

Q: a food sample with an unknown number of contaminating bacteria was serial diluted to 10-6. the 10-6…

A: Serial dilution is a process of diluting a particular sample in a solution. The purpose of doing a…

Q: Why does motility media contain a lower amount of agar than ordinary agar?

A: Agar is a phyco-colloid polymer of galactose monomers obtained from red algae (Gelidium and…

Q: Your broth culture contains 471,612,048 bacteria/mL. Design a dilution series that would  result in…

A: To ensure an accurate count of bacterial colonies on agar plates, it's crucial to design a dilution…

Q: Lactose fermentation

A: The dichotomous key is the tool for the identification of unknown organism among the group. Choice…

Q: While working with Mannitol Salt Agar you notice the growth of staphylococci however other…

A: Mannitol Salt Agar (MSA) is a media which has high concentration of salt solution. There are found…

Q: If lysozyme is added to a microbial culture. Predict what will be observed if the culture is…

A: Microorganisms are small organism that cannot be seen by naked eyes. They include bacteria, fungi,…

Q: MacConkey agar inhibits the growth of Gram-positive bacteria while encouraging the growth of…

A: In microbiology, MacConkey agar is a versatile medium that is frequently used. It is a selective…

Q: Did each handwashing treatment result in similar types of organisms growing on the plates? (look at…

A: The science of tiny creatures' biology includes viruses, bacterium, algal, fungus, slime moulds, and…

Q: You inoculate a species of bacteria on a MacConkey agar which normally shows positive growth and the…

A: MacConkey Agar (MAC) is selective and differential agar that is used to isolate non-fastidious…

Q: Why is a metal loop heat to read before picking up a bacterial sample? What should you do with a…

A: In microbiology, inoculation is the technique of transferring bacteria into culture media so that…

Q: Questions 1 Predict the effect of the following "mistakes" made when performing a Gram stain. Your…

A: In order to understand the mistakes made in Gram staining procedure we need to understand the whole…

Q: If you run the motility test on Motility Medium and hanging drop for Bacillus cereus and B.…

A: Answer:  HANGING DROP TECHNIQUE : It is the special type of wet mount which is made from a drop of…

Q: How would you identify this unknown bacteria using a flowchart and the bacteria below as a possible…

A: Biochemical tests in Microbiology help in distinguishing and identifying bacteria. Through the…

Q: ● . If the culture from which you are preparing the slide is a liquid, simply flame your loop, allow…

A: Introduction:- Cells are the basic structural and functional unit of life. Cells are capable of…

Q: Bacteria are not used as probiotic agents. True O False The growth of bacteria that form endospores…

A: Bacteria are prokaryotic microorganisms. Bacteria are ubiquitous in nature and are found almost in…

Q: You aseptically transfer 1 ml of your optional liquid culture into 99 ml of sterile water. What is…

A: The following are needed for calculating the dilution factor  1) Original volume of  solution we…

Q: Bacteria should grow on plates with media containing . ..... to perform blue/white screening   x…

A: Bacteria should grow on plates with media containing beta galtoside is required to perform…

Q: In this exercise, the action of bactericidins will be evaluated by __________. observing color…

A: Bacteriocins are small and cationic antimicrobial peptides, ribosomally synthesized by lactic acid…

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: You have 0.05 ml of kombucha that contains microbes at a concentration of 8.2 x 10^6 CFU/ml. You…

A: Creating proper dilutions and working out the colony-forming units or CFU/ ml is one integral part…

Q: You count 4 squares of a hemacytrometer and ontain 82,65,85 cells in each squy.what is the cell…

A: Hemocytometer is device used for the counting of blood cells in a sample. It has counting chambers…

Q: The vp test looks for products of fermentation

A: Biochemical tests utilize the specific characteristics of bacteria to identify them accurately. Some…

Q: Which lactose (+), Gram negative, short rod forms a pink to brick red colony on MacConkey's agar and…

A: Bacteria that cannot retain the crystal violet stain as their cell envelopes are composed of…

Q: Membrane filters

A: Membrane filter are made up of cellulose.

Q: You have a broth medium that you would like to turn into a solid medium in order to do streak…

A: The "nutrient broth" is essentially nutrient agar without the solidifying agent. They stay liquid at…

Q: Appearance Motility observed Staphylococcus epidermidis Escherichia coli of 1180 C e

A: Staphylococcus epidermidis is a gram-positive microorganism that is commonly found in the human…

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.