which of the following is best to sterilize heat-liable (sensitive) solutions? a, pasteurization b. autoclave c. dry heat d. filration e. none of the above

Q: Choose the false statement below. O High efficiency particulate air filters or HEPA filters are…

A: Sterilization is a process of complete destruction or inactivation of bacteria or pathogens. It…

Q: Which of the following is NOT a chemical method of microbial control? a) refrigeration b) ethyl…

A: In order to stop the spread of infections and diseases, microbes must be under control. Thereby…

Q: In sterilization, which among the supplies, instruments, glassware, etc. under the list of materials…

A: Hot air oven= powder, oil, liquid paraffin, glass wares, metal sharps  Autoclave= media, reagents,…

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: If the pH indicator were left out of MacConkey agar, the medium would bea) complex.b)…

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

Q: Microorganism A was exposed to different constant temperatures to get the specific D- values.…

A: The Z-VALUE is the boom or decrease in temperature required to lessen or increase the decimal…

Q: Choose two from the following culture preservations that are best to use when only an ordinary…

A: Many laboratories and biological companies maintain large culture collection centres. These are…

Q: Why are endospore vials used to test autoclave function?   A. they change color when killed B. they…

A: The whole Earth is full of a lot of organisms. Unicellular and multicellular organisms inhabit the…

Q: Choose the combination of answers that most accurately completes the statement.Detergents are a.…

A: Answer: Introduction: A detergent means a surfactant or a combination of surfactants that used for…

Q: Choose the combination of answers that most accurately completes the statement.Microbe(s) that…

A: The unicellular minute organisms which are not visible from the naked eye are known as microbes.…

Q: A selective media  a) inhibit the growth of certain bacteria while allowing others to grow b)…

A: An example of selective media includes- eosin methylene blue that is toxic to Gram-positive bacteria…

Q: The mechanical removal of microbes from a limited area of living tissue is referred to as -- a.…

A: Control of microbial propagation is very significant in medical, pharmaceutical, food industries,…

Q: The most versatile method of sterilizing heat-sensitive liquids isa. UV radiation b. exposure to…

A: Sterilization is a process of removing or killing or deactivating mostly all forms of life present,…

Q: commercial sterilization is designed to provide enough heat to destroy the endospores of what…

A: It refers to any process that removes , kills or deactivates all forms of life particularly…

Q: The process in which all organisms and pathogens are destroyed is called ------.  a) Disinfection…

A: Microbes are responsible for various diseases in humans as well as animals.Microbes and pathogens…

Q: Which statement among A-D is false regarding physical and chemical agents of control? A) O Effective…

A: Sterilization and pasteurization are equivalent processes because both are used to kill…

Q: Transparent double-sided dishes used for growing microbes are most commonly called A) Petri dishes.…

A: The micro organisms are grown in specific containments for identification of the characteristic…

Q: Milk is usually pasteurized by a. the high-temperature short-time method c. batch method b.…

A: Pasteurization is the process, in which bacteria are killed and the sterilization is done to improve…

Q: If you have a substance that you wish to sterilize (without destroying), and that substance is…

A: Introduction Any procedure that eliminates, eradicates, or renders inactive all life…

Q: Which of these disinfectants is least effective against E. coli? a. Chlorine b. o-phenylphenol c.…

A: Disinfectants: These are the chemical compounds which are applied on the non living objects to kill…

Q: Agar is superior to gelatin as a solidifying agent because agar a. does not melt at room temperature…

A: Agar is used as a medium for culturing in laboratories.

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: the process of converting TAG to fatty acid salt and alcohol.* Please choose one correct answer only…

A: Triglycerides or Triacylglycerol (TAG)  are lipids comprised of three fatty acids esterified with…

Q: give one reason why is it necessary to keep stirring the agar medium mixture in a beaker when…

A: Agar is a heteropolysaccharide, which is composed of different carbohydrate units. Agar is obtained…

Q: Spread plating_is used to sterilize the spreader or Lrod: a. Ethanol bHeating over flame C.…

A: Spread plate technique  is used to isolate bacteria . It is a microbiological technique .

Q: I need help with question number 49

A: Microbial control indicates the prevention or inhibition of microbial growth. It involves physical…

Q: An inoculating loop must be flamed to uniform orange-hot from base to tip   A. after culture is…

A: An inoculation loop is a tool used by microbiologists to transfer a small culture of microorganisms.…

Q: placing bacteria at ultracold temperatures is as effective at killing microbes as the use of dry…

A: true

Q: You perform a nitrate test. After adding solutions A and B, the broth remains colorless. Why should…

A: Nitrate test helps us to determine the production of nitrate reductase enzyme. By the activity of…

Q: A fastidious organism must be grown on what type of medium? a. general-purpose medium c. synthetic…

A: The medium or the growth medium has essential nutrients for the growth of the microbes. There…

Q: which of the following is a limitation of the autoclave? a. long length of time required for…

A: Sterilization is the process which helps in removal ,killing and deactivation of all kinds of life…

Q: medium in which all the components are known is: A. Minimal medium B. Synthetic or defined medium…

A: Microorganisms are small, unicellular, and microscopic organisms. It is important to grow…

Q: 1-The method of sterilizations we used in the tissue culture lab a. Fumigation b. Filtration C.…

A: The removal of any microorganism or viable spores or bacteria or viruses from the surface. The…

Q: Which of the following medium would be most appropriate for the bacterial cultures from stomach? a.…

A: Microorganism culture out of their natural environment in pure form in the laboratory has been…

Q: Discuss the actions of the ditterent chemical agents in controlling microorganisms: L phenols 2.…

A: Chemical agents plays a major role in eradication of microorganisms from the environment.

Q: what is the purpose of using oil immersion with the 100x objective lens? a)To prevent refraction of…

A: Answer is option a.) To prevent refraction of light.

Q: Chlorinating swimming pools is an example of______________ to control microbial populations. A.…

A: Disinfection of swimming pool means killing all the pathogenic microorganism species in the pool…

Q: Agar is a solidifying agent used in media preparation.a. What is its origin? b. What makes it ideal…

A: A growth medium or culture medium is a gel or liquid designed to support microorganism growth. The…

Q: If you streak a sample from your nose onto a Mannitol salt agar plate and the medium turns yellow,…

A:

Q: I need help with question 43 thank you

A: Sterilization by heat is one of the key factors for eradicating the microbes. The heat has the…

Q: Which of the following is used in the sterilization of the medium? a) benmarge b) swab c) autoclave…

A: Sterilization is the process of making something (instrument, swab, room etc. ) free of microbes…

Q: Use the following diagram to explain how Pasteur’s swan-necked flasks prevent contamination of…

A: Introduction The name "Swan Neck Flask" comes from Louis Pasteur's use of a particular flask with a…

Q: Please explain the differences between freeze drying,drum drying and air drying and which give a…

A: Freeze drying, drum drying, and air drying are dring methods to remove water content from the cell…

Q: Which of the following is a limitation of the autoclave? a)  Long length of time required for…

A: Answer- In research the use of contamination free equipments is mandatory. The main apparatus used…

Q: Which of following statements is TRUE about antiseptics and disinfectants?  A. Disc diffusion works…

A: The use of antiseptics and disinfectants is now unavoidable but what factors affect these processes…

Q: Which of the following items is the least suitable for sterilization by autoclave? a. Water for…

A: An autoclave is a machine that is used to perform industrial and scientific processes that require…

Q: Which of the following takes the LONGEST to kill a live culture of vegetative bacterial cells?   a)…

A: A "microbe" is a living entity that is so tiny that it cannot be seen with the naked eye.…

Q: a) explain in your own words how to do a nitrate reduction test to identify unknown bacteria

A: Biochemical test such as nitrate reduction test and phenol red test are used in the identification…

Q: In controlling and eliminating of infectious agents in reusable supplies,w hat process should be…

A: In healthcare settings, infectious pathogens are more prominent and to prevent them all the…