Q: Briefly define culture medium.
A: Microbiology is the branch of science which deals with the study of microorganisms like, bacteria,…
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: Microorganisms are often grouped according to their optimum growth temperatures. Which groups are…
A: Bacteria spoil refrigerated foods.
Q: WATER PURIFICATION AT THE WATER SUPPLY STATION USES THE CHEMICAL METHOD 1. irradiation of water 2.…
A: Water purification is a process of removing pollutants, microbes and other impurities from water. It…
Q: Which concentration of alcohol is the most effective germicide?a) 100% b) 75% c)…
A: The agent used to kill microorganisms or germs is called germicide. Germs can be microscopic…
Q: What is the appropriate dose (chlorine, ozone, ultraviolet rays) to sterilize water per 100 cubic…
A: Hi! Thank you for the question! Since the appropriate dosage of ultraviolet rays is not known, the…
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: Which of the following would be best for sterilizing a pre-sealed case of plastic medical supplies?
A: Answer - Autoclave
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: When can gelatin be used in culture media preparation? [Answer in not more than 2 sentences
A: GELATIN: Gelatin, often known as gelatine, is a transparent, colourless, and flavourless culinary…
Q: The optimum growth pH for a microorganism is usually: 4,5,7 or 8
A: pH is the scale on which the acidity or alkalinity is measured. It is the scale between 1 to 14.…
Q: Agar is a solidifying agent used in media preparation. What is its origin?
A: Agar gel is a polysaccharide which can become liquefied at temperatures ranges from 85°C to 90°C and…
Q: In the laboratory, autoclaving is required to prepare media for the growth of What type of method of…
A: The most effective method by which we sterilize the laboratory instruments is known as autoclaving.
Q: What a scrubber in the exhaust of chemical industrial plant removes?
A: Pollution is the introduction of contaminants into the natural environment that cause adverse…
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: 8- The following are methods of sterilization EXCEPT: O c) Sterilization by filters O b) Autoclaving…
A: Introduction: A combination of heat, chemicals, irradiation, high pressure, and filtration can be…
Q: Which of the following are proper disinfection steps? Check all the O Remove organic matter O…
A: Introduction: Disinfection is substances that are applied to non-living objects to destroy…
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: BACTERICIDE LAMPS OF A CLOSED TYPE SHOULD BE INSTALLED IN 1. premises for pharmacy visitors 2.…
A: Introduction UVGI (ultraviolet germicidal irradiation) is a disinfection technology that kills or…
Q: For each item on the following list, propose a reasonable method ofsterilization. You cannot use the…
A: There are several sterilization techniques which can be used. But, the technique to be used varies…
Q: Why is the time of exposure and temperature required for sterilization greater for dry heat than for…
A: Any technique that removes, destroys, or deactivates all forms of life and other biological agents…
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: why do microorganisms differ in their response to disinfectants
A: Microorganisms are the minute microscopic organism that is generally invisible to the human eye.…
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: What are high level disinfectants? What is an example of one? What is the method of action and the…
A: Disinfectants are chemicals that are used to kill the microorganisms present in the surroundings.…
Q: Oven sterilization of aqueous culture medium. Effect: Rationale:
A: Oven sterilization utilizes dry heat of about 160 or 170 degrees celsius for one hour or 30 minutes,…
Q: I need help with question number 49
A: Microbial control indicates the prevention or inhibition of microbial growth. It involves physical…
Q: What microorganisms, specifically, could contaminate the yogurt sample?give at least five (5) do's…
A: Microorganisms play an important function in the ecology. The phrase "microorganism" refers to…
Q: What are some advantages and disadvantages of using ionizing radiation to sterilize food?
A: Sterilization involves physical methods for removing or controlling the microbes. The physical…
Q: During media preparation, you observed that the agar medium did not solidify after sterilization…
A: Nutrient Agar Medium is the artificial media which is used to grow microbes. It provides essential…
Q: Define disinfection. Compare/contrast it with sterilization, antisepsis and bacteriostasis.
A: Sterilization, disinfectant, antisepsis and bacteriostatic all terms are related to halt the growth…
Q: WHAT IS THE TYPE OF Growth patterns on Agar Slant and Broth Medium
A: Growth and morphogenesis of plant is determined by the composition of culture media. There are few…
Q: C MSA (Mannitol Salt Agar) Match the description to the correct Bacterium A= growth, agar is yellow…
A: Microbiology is the branch of science that deals with the study of microorganisms that are too small…
Q: What appropriate method should be used in controlling microbial growth in each of the following? 1.…
A: The control of microbes and other biological agents from organic substances is called sterilization.…
Q: Leachate production is what
A: A leachate is any liquid that, extracts soluble or suspended solids from the material through which…
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: FILTERING IS FILTERING 1. physical method of disinfection 2. the physical method of water…
A: Q. FILTERING IS FILTERING 1. physical method of disinfection 2. the physical method of water…
Q: Why is it necessary to store the molten agar in a water bath at 50 degrees Celsius?
A: Introduction:- Agar is made up of two polysaccharides: agarose and agaropectin, with agarose…
Q: ection steps! Which of the following are proper disir ORemove organic matter O Disinfect only O…
A: Microscopic organisms such as bacteria, fungi (mold and yeast), protists, archaea, algae,…
Q: What is the effect of pH in the shelf life of unsterilized media? [Answer in not more than 2…
A: The shelf life of unsterilized media will decrease due to the pH.
Q: The following methods used for sterilizing an antibiotic solution. i. Dry heat sterilization ii.…
A: Sterilization: Microorganisms cause contamination, infection, decay and it is important to remove…
Q: List 5 other methods of sterilization and describe the principle/s and when each method is used.
A: (Please note that, you provided more than one question, I can only answer one question at a time,…
Q: Explain why desiccation and cold are not reliable methods of disinfectionbut how they can still be…
A: Sterilization is a technique that removes, kills, or deactivates all forms of life and other…
Q: which of the following is not a chemical method of microbial control
A: Answer is option c - Filteration Filteration is not a chemical method of Microbial control.
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…
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…
Q: List 2 non-chemical means of disinfection.
A: Disinfection refers to the process by which most pathogenic disease-causing microorganisms, except…
Q: After the mordant has been added, Gram-positive organisms are stained __________ and Gram-negative…
A: Gram staining is a staining technique used to differentiate two large groups of bacteria based on…
Why should caps of glassware be loosened first before sterilization? [Answer in not more than 2 sentences]
Step by step
Solved in 2 steps
- Can culture media be sterilized in the hot air sterilizer? Why or why not? (Answer in not more than 5 sentences)Which physical or chemical agent would be the best choice for sterilizing the following items: glass pipettes, tryptic soy broth tubes, nutrient agar, antibiotic solution, interior of a biological safety cabinet, wrapped package of plastic Petri plates? Explain your choices.ILLUSTRATIONS: 1. Sterilizers seen in the laboratory and their parts.
- Why is heat a highly effective sterilizing agent? (Answer in not more than 2 sentences)Why must you first clean debris from items before beginning disinfection or sterilization? (Match the most appropriate method of sterilisation for the following items. 10 mL vitamin solution 5 mL antibiotic solution Petri dishes 1 L of water 1 L of nutrient broth medium Talcum powder Charcoal powder [Choose ] [Choose ] Gamma radiation Autoclave Dry heat oven Filtration [Choose ] [Choose ] [Choose ] [Choose ] [Choose ]
- Answer the ff with not more than two sentences: Why should Erlenmeyer flasks hold not more than 60% of their capacity? When can gelatin be used in culture media preparation? How does cotton plug prevent contamination of the medium? Why should caps of glassware be loosened first before sterilization?Identify the microorganism/ group of microorganisms involved in the spoilage of the following food: a.. Canned curdled evaporated milk b. Blue cottony growth on orangesHow does cotton plug prevent contamination of the medium? [Answer in not more than 2 sentences]
- The steps to convert chaulmoogra oil into an injectable treatment are: I. extraction II. saponification III. hydration IV. acidification V. esterificationAt the Brewery part 2: Continue identifying microbes you islated from the contaminated beer: Microbe 2: top photo growth on Sabauraud Dextrose agar; bottom microscopic viewThe optimum growth pH for a microorganism is usually: 4,5,7 or 8