Which concentration of alcohol is the most effective germicide?a) 100%        b) 75%            c) 50%d) 25%          e) 5%

Q: What is the pathogen that exhibits the greatest resistance to heat treatment is the bacteria ?

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

Q: Drying is an effective antimicrobial strategy because:(a) It oxidizes cellular macromolecules(b) It…

A: Answer is b.) It limits the amount of water available to microbes.

Q: Would you be able to grow a sample obtained from a patient's wound (suspected to be infected with…

A: MRSA is Methicillin-resistant Staphylococcus aureus. It is antibiotic resistant bacteria which is…

Q: Could an organism that is susceptible to an antimicrobial agent in laboratory testing fail to…

A: To identify the acceptable antimicrobial agent and dose for treatment of microorganism infections…

Q: What are the approaches for sterilization during the production of sterile products? Please answer…

A: destruction or complete removal of all living organisms and their spores is called as sterilization.…

Q: What growth factor is often supplied for cultivation of fastidious bacterial pathogens?

A: A fastidious organism requires specific nutrients for growth. In microbiology, the culture medium…

Q: What is germicide used to kill?

A: A substance or specialist that kills germs, particularly pathogenic microorganisms; a disinfectant.…

Q: Why do we test water for coliforms if they are not considered pathogenic?

A: Introduction Coliforms are gram-negative, non-sporulating and motile or immotile bacteria. They…

Q: Where should a label be written on an agar plate?

A: The aseptic technique is applied in a laboratory setup to reduce the risk of contamination. It…

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: What is the primary reason that wine is pasteurized?

A: Food technology is a branch of science which deals with various aspects of food science such as…

Q: What temperature is considered adequate for achieving sterilization of a compost pile?

A: temperature considered for achieving sterilization of a compost pile is 135-160 F. At a…

Q: What is the purpose of degerming? Does it completely eliminate microbes? What are some factors that…

A: 1.Degerming is the process used to reduce mircrobial numbers by gently scrubbing tissue with a mild…

Q: How can I tell if there is contamination?

A: RFLP is a type of DNA polymorphism that has DNA sequence variations that can be recognized by…

Q: What is the purpose of food irradiation, and how does it work?

A: Irradiating food kills bacteria and extends life of the food.

Q: Why does a population of microbes not die instantaneously when exposed to an antimicrobial agent?

A: Antimicrobial agents are agents that are used to stop or prevent the growth of microbes. They…

Q: How alcohol is effective at contolling microbial growth?

A: Sterilization: Sterilization includes the complete wipeout of all microscopic life on a surface.…

Q: The use of sodium chlorite to inhibit the growth of Shigella in drinking water refers to ? O A.…

A: The use of sodium chlorite to inhibit the growth of Shigella in drinking water refers to…

Q: How does the extremely high resistance of bacterial endospores influence sterilization practices,…

A: Endospore refers to a nonreproductive, dormant composition generated by some kind of bacteria. It…

Q: Why are Sterilization, Antisepsis and disinfection necessary?

A: Sterilization is the process of killing or deactivating all forms of microorganisms and spores.…

Q: Why is heat a highly effective sterilizing agent? (Answer in not more than 2 sentences)

A: Introduction Sterilization Refers To Any Method That Is Able To Either Removes, Kills, Or…

Q: Why should caps of glassware be loosened first before sterilization? [Answer in not more than 2…

A: Sterilization is defined as the process which removes , kills or deactivates all forms of life (in…

Q: What is selective medium?

A: Description of a selective medium.

Q: what type of bacteria may cause spoilage in coconut water that has been in the fridge for more than…

A: Coconut Water   Coconut water (CW) is a slightly sweet liquid made from the endosperm of coconuts.…

Q: How we can isolate microorganism from food?  Please briefly explain at your own words.

A: Microorganisms are cosmopolitan in nature, which means they are present everywhere- in air, on…

Q: What is soil pollution?Suggest various ways to prevent soil pollution?

A: Pollution is the unwanted introduction of contaminants into the natural environment that cause…

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: How does an autoclave sterilize instruments? What is used to dry glassware and at the same time

A: Autoclaving is the best method for sterilizing glass instruments. Sterilizing means removal of all…

Q: Name the source from where agar is commercially obtained.

A: Agar is a jelly-like substance that is made up of linear polysaccharide agarose and a heterogenous…

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: Why do soil microbes naturally produce antibiotics?

A: Antibiotics are metabolic products of microorganisms that inhibit or completely destroy the growth…

Q: Which of the following control agents help to be used to achieve sterility? - Virucide - Sporocide…

A: Sterilization can be achieved through various means, including heat, chemicals, irradiation, high…

Q: how could you determine if there is any contamination on your agar?

A: Agar consists of two polysaccharides, agarose and agaropectin, but agarose making up about 70% of…

Q: What is  bactericide exposure?

A: The term bactericide is related to bacteria. Bacteria are unicellular and prokaryotic organisms that…

Q: Based off Pasteur’s sterility experiment, which of the following choices is least likely to result…

A: Louis Pasteur was the scientist who invented pasteurization, which is a technique to kill…

Q: How can organisms develop resistance to chemical disinfectants?

A: Bacteria can develop resistance to disinfectants over time either by acquisition of exogenous mobile…

Q: Do pure cultures have to be used in a chemostat?

A: Chemostat is a culture chamber where microorganisms are cultured under static environment. The…

Q: What microbe requires serum components to be added to the growth medium?

A: Introduction Microorganisms:- An organism that can be seen only through a microscope, They live in…

Q: Describe the procedure involved in Sewage treatment?

A: Sewage treatment is the process of removing contaminants from wastewater and household sewage water.…

Q: How does being in a biofilm affect an organism’s susceptibility to antimicrobial agents?

A: Introduction  Microorganisms can be found living in colony or in solitary. However, sometimes…

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: How to reduce or eliminate aerial contamination inside the laboratory?

A: Indoor air quality (IAQ) : To main the indoor air quality becomes an important aspect especially in…

Q: Write the limitations of sterilization by Dry heat?

A: The dry heat sterilization technique includes the removal or killing the microorganism and require…

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: What is the difference between disinfection, antisepsis, and sterilization?

A: Microorganisms are present every where. They are not visible with naked eyes but are present at…

Q: If you suspect that your microbial culture growing in nutrient broth is contaminated, what can you…

A: The contamination refers to the growth of one or more undesired cultures in your pure sample. It can…