The optimum growth pH for a microorganism is usually:  4,5,7 or 8

Q: A positive lipid hydrolysis test is indicated by the growth of bacteria on the medium. A positive…

A:

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: 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: Agar is a solidifying agent used in media preparation. What makes it ideal for cultivation of…

A: Agar is a natural polysaccharide. It is mostly used in the lab and acts as a solidified agent. It…

Q: component used as a solidifying. .-1 agent for media

A: Since there are multiple questions in this particular question I'll answer the first one for you. If…

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: 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: What nutrients do the following media components contain? • Peptone Yeast extract Beef extract •…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Need help  Can a pure culture be prepared from a mixed culture in a broth or plate? Explain.

A: INTRODUCTION How to make a pure culture from mixed culture is explained below.

Q: which of the following is best to sterilize heat-liable (sensitive) solutions? a, pasteurization…

A: From above question Option d (filtration) is correct.

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: ing is a recipe for a bacterial growth medium: 35 g Dextrose, 12 g Aga 1.2g Salt, 3 g Yeast cell…

A: Growth medium can be of many types. Growth media is a media which contains nutrients for chemical…

Q: Disinfectant Concentration Growth after time of exposure (minutes) Control 5 minutes 10 minutes…

A: * Disinfectant is a chemical substance that inactivates or to destroy the microorganisms that are…

Q: A chemical solution in the form of a tincture is more effective at destroying microorganisms or…

A: The tincture is an antiseptic ,which is made by the aqueous solution or alcoholic solution of…

Q: The cell concentration measured in samples taken at certain intervals from a microorganism growth…

A: From the given table,   Cf, final cell concentration =0.376  Ci, initial cell concentration=0.01…

Q: نقطة واحدة the solvent in recrystallization * should not be dissolve the compound to be crystallized…

A: We are authorized to answer one question at a time since you have not mentioned which question you…

Q: which of the physiologic environments are sensational for biomaterials * mechanical strength,…

A: Biomaterials refer to a group of substances that are used to interact with biological systems. It is…

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: Membrane filters

A: Membrane filter are made up of cellulose.

Q: You were tasked to determine the total microbial load of a bread sample. The sample was homogenized,…

A: Question: Draw a schematic diagram illustrating the proposed experimental setup described above?

Q: In a nutrient broth, where do microorganisms acquire their requirements for mineral  elements like…

A: Microorganisms are grown in laboratories using culture media. Culture media contains all the…

Q: If the temperature of the incubator were to be increased from 35 to 45°C, how would this affect the…

A: The growth of bacteria is influenced by many physical factors. Temperature is one of the significant…

Q: I need hand written solution

A: Global oxygen delivery (DO2) is the total amount of oxygen delivered to the tissues per minute,…

Q: Which of the following best descrives UTI agar? Selective growth media; Differential Growth Media;…

A: A growth or culture medium is a liquid, solid or semi-solid medium, which is designed in a way that…

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: Give a brief but critical discussion about microbial growth in natural environments and how it…

A: Living creatures reproduce and grow. Microbes become metabolically active and proliferate when they…

Q: Compare and contrast the action of alcohols, halogens, and ­oxidizing agents in controlling…

A: Alcohol is used as disinfectant for centuries.Alcohol is extremely effective in fight against single…

Q: Why is a Bunsen burner used in the microbiology lab? (select all that apply) The flame is used to…

A: Answer -The flame is used to sterilize the inoculating loop. -The flame kills microorganisms that…

Q: An organism capable of growing only in a low salt concentration, such as saline, is considered…

A: According to guidelines we have to answer the first question only. so please kindly post the…

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: You were tasked to determine the total microbial load of a bread sample. The sample was homogenized,…

A: Serial dilution is a step-wise dilution of microorganisms in the solution. The dilution factor…

Q: Z-germicSide is an antimicrobial agent. Based on the given data set below, describe how effective…

A: Phenol is used as an antiseptic and disinfectant against various types of micro-organisms like…

Q: If my cultures are suffering severely due to alkaloid production and accumulation in the medium. In…

A: Alkaloids are basically the natural substances that can be used largely for human medication.…

Q: Requirements of Autoclave for sterilization

A: autoclave is an instrument used for sterilization of equipments and media cultures etc in the…

Q: Spores and toxin-producing microorganism produce toxins need higher Aw than minimum Aw for microbial…

A: Water activity (aw) is basically a term describing the availability of water to microorganisms. It…

Q: Which has a greater impact on the survival of an organism, temperatures above its maximum…

A: The microbes grow in a wide temperature range. The microbial growths are found to be higher at their…

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: Give the components, properties and special considerations in preparation (if there's any) on the…

A: MacConkey Agar . It is selective for gram- negative rods bacteria. EMB . It is selective for fecal…

Q: Growth medium: You are running different experiments on microbes and need to make sure you choose…

A: A growth medium is a solid/ liquid media designed to support the growth of a population of…

Q: You are cultivating Escherichia coli in a chemostat culture. The maximum specific growth rate (µmax)…

A: A chemostat is a bioreactor containing culture where the fresh medium is continuously introduced at…

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: CHLORINATION IS 1. by means of special water treatment 2. the physical method of water purification…

A: Chlorination is one of the methods used for the disinfection of water.  Millions of microorganisms…

Q: Lowering the water activity of a food will inhibit the growth of microorganism in which of the…

A: Enzymes are usually made of globular protein molecules that increase the rate of reaction without…

Q: The chemical precipitation method can be used for ceramic nanoparticles production. * TRUE FALSE

A: “Since you have asked multiple questions, we will solve the first question for you. If you  want any…

Q: Granulation of powder is an essential step in preparation of all types of tablets

A: Tablets are solid dosage unit. It consists of active substances in the powder form and can be…

Q: Superoxide ion is toxic to strict anaerobes because they lacka. catalase b. peroxidase c. dismutase…

A: A superoxide basically is a compound that do contain the superoxide ion, having  the chemical…

Q: Which ingredient is included in the motility test to make the results easier to see? bromthymol blue…

A: A motility test is a test that is performed to check whether the organism is motile in its nature or…

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.