Since there are still bacteria left in pasteurized milk, why is it not routinely sterilized instead so that everything is killed?

Q: Why 10% bleach disinfectant are most against probiotic?

A: Disinfectant is a chemical liquid that destroys bacteria,  thereby causing disinfection.

Q: How does pasteurization affect the number of bacteria present in milk? What differences, if any,…

A: To control microbial growth or contamination there are a number of aseptic techniques developed that…

Q: Why do you have to boil the agar solution before dispensing it into tubes?

A: Agar is the medium which can used to grow the micro organisms in petri plates. The selected…

Q: Can culture media be sterilized in the hot air sterilizer? Why or why not?

A: Hot air sterilization is a procedure in which the sterilization of the objects are done using hot…

Q: What is agar and why is it necessary for growing bacteria on plates?

A: Agar is a mixture of two polysaccharides- agarose and agaropectin. It is derived from red-purple…

Q: Explain why a green metallic sheen is formed when E. coli is grown on Eosin Methylene Blue Agar.

A: Escherichia coli is the gram negative bacteria.

Q: Why are meats prime vehicles for pathogenic E. coli? How cancontaminated meat be rendered safe to…

A: E.coli is a gram-negative bacteria. It is a facultative anaerobe. Has a rod shaped structure and…

Q: How does pasteurization help us in our everyday life even before it was discovered?

A: As recently as the nineteenth century, humans risked serious illness or even death by drinking…

Q: How does pasteurization affect the number of bacteria present in milk?

A: Pasteurization: It is a process which involves heating liquids at high temperature for a particular…

Q: Why should culture media after inoculation be incubated at an optimal temperature immediately?

A: Culture media, also called as growth media, are particular combinations of nutrients and other…

Q: Does pasteurisation effectively kill all the miroorganisms in milk?  If not, why is it used?

A: Pasteurisation includes warming fluids at high temperatures for short measures of time.…

Q: Why do you think the continuous culture has higher chances of contamination than batch and fed-batch…

A: Continuous culture may be a set of techniques wont to reproducibly cultivate microorganisms at…

Q: why do We need to Wait for the iron Agar to set and then Add another thin layer of 45°C Iron Agar?

A: The test that uses iron agar is the Triple Sugar Iron (TSI) Test and is used to determine the…

Q: What is the correct shape of the unknown bacterium growing on your mannitol salt agar

A: Mannitol salt agar also known as MSA is commonly used selective agar in microbiology. This material…

Q: Why did we both stab and streak our blood agar plates when inoculating them with bacteria?

A: Blood agar is a nutrient medium which contain essential nutrients for bacterial growth and blood of…

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: Could you spread plate in the usual Petri dish a 10mL inoculum?

A: The spread plate method is a technique to plate a liquid sample containing bacteria so that bacteria…

Q: Why does keeping milk in the refrigerator prevent it from going bad? What would happen of we added…

A: Food preservation is the technique used most commonly in food industries and homes to avoid the…

Q: What would you expect to see if you cultured Gram-positive, lactose-fermenting bacteria on MacConkey…

A: Given: What would happen if you culture gram positive, lactose fermenting bacteria in MacConkey…

Q: Where do spoilage microorganisms come from? What are some of the most common spoilage…

A: Food spoilage is a metabolic process which causes food to be undesirable or unacceptable for…

Q: Why would cells that are vigorously growing when inoculated into fresh culture medium have a shorter…

A: Growth curves are generally the description of the density of cell populations in liquid culture…

Q: Which of the following media selects for gram negative bacteria by inhibiting the growth of gram…

A: Selective media:- it usually allow the growth of a particular microbe and inhibit the growth of…

Q: If a component is heat sensitive, how might you conveniently achieve sterility of that medium? a.…

A: Option A i.e. filtration

Q: is staphylococcus aureus cells under 40 times magnification bigger than onion cell or cheek cell?

A: Staphylococcus aureus is a Gram-positive, round-shaped bacterium that belongs to the Firmicutes and…

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: Why does dry heat require higher temperatures for longer time periods to sterilize than moist heat

A: Sterilization may be defined as the process which help in the complete removal of all…

Q: Why must you first clean debris from items before beginning disinfection or sterilization? (

A: Until the discovery of the microbes by the famous scientist Louis Pasteur, one of the signs of the…

Q: Can culture media be sterilized in the hot air oven? why or why not?

A: Sterilization is the process of deactivating, killing, or removing any kind of microorganism (or…

Q: Why is 15 minutes generally used for sterilization? Why is agar added to medium?

A: Sterilization is the process in which all life forms like microbes (fungi, bacteria, viruses,…

Q: How can moist heat sterilization can sterilize antibiotic solution?

A: Moist heat sterilization is a technique that uses heated, increased pressure steam to sterilize an…

Q: Why can milk become sour due to bacteria even though it has been pasteurized?

A: Pasteurization is the process in which non-packaged and packaged foods such as fruit juice, milk, or…

Q: What is the nature of samples that should NOT be placed inside the drying-oven?

A: According to the question, we have to explain the nature of the samples that should not be placed…

Q: In hospitals they remove potential pathogens from surfaces using------------: Antiseptics…

A: Sterilization It is a process of complete removal of micro-organism. It include several methods such…

Q: How is household antibacterial soap like a weapon against pathogenic bacteria?

A: Antibacterial soaps are those that contains certain chemicals that inhibit the growth of pathogens .

Q: What type of agar is MacConkey agar?

A: MacConkey agar or MAC which is also described as a bacterial culture medium was named after the…

Q: Why should you filter some liquids for sterilization, rather than autoclaving them?

A: To control microbial growth or contamination there are a number of aseptic techniques developed that…

Q: Why is egg enrichment not added to BPA prior to sterilization?

A: Baird–parker agar or BPA is a selective medium is identify or isolate S. aureus in food. It contains…

Q: Which dye will not kill microorganisms if a wet preparation is made? Why?

A: Microorganisms are defined as organisms that cannot be viewed by the unaided eyes and are studied…

Q: Why is the temperature of pasteurization at 60°C?

A: Pasteurization was invented by a French Scientist called Louis Pasteur. It was first used in 1864.…

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: Why is the sterilization important in healthcare system and can you give briefly explain?

A: Medical sterilization mainly makes use of three important terms such as sterilization, disinfection…

Q: Why do petroleum-degrading bacteria need to attach to thesurface of oil droplets?

A: Petroleum is a crucial strategic resource and all countries compete fiercely for it. The…

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: Why does honey stay at room temperature for months/years without "spoiling" or being affected by…

A: SPOILAGE- Mostly contamination comes from external sources during bleeding, handling, and at the…

Bacterial Morphology

The bacteria are prokaryotic organisms that are single-celled, and are found to exist as free-living and possess a microscopic size. The morphology is found to vary in the bacteria, where some of them are identified as individual organisms and the others are detected as colonies. The size and shape of the bacterial cell also represent its morphology. 

Bacterial cell structure

Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. Bacteria are microscopic organisms that are tiny and unicellular. These are members of the prokaryote kingdom. They live in water, air, soil, and all-natural environments. They are used in industrial and therapeutic processes, and they support a wide range of plant and animal life. The first organism to appear on the planet. Bacteria-like creatures are the oldest known fossils. Bacteria can consume a wide range of organic and inorganic elements, and some may even survive in harsh conditions.