1. Which of the following chemicals is a persistent organic pollutant (POP), but is produced naturally (not artificially by humans)? A. DDT (dichloro-diphenyl-trichloro-ethane), produced as an insecticide B. ethyl-mercaptan, produced by skunks C. PCBS (polychlorinated biphenyls), produced for electrical insulation D. aldrin, produced as an insecticide E. dioxins (like 2,4-D), produced as a byproduct of herbicides

Q: II. A bacterium can use hydrogen gas (H₂) to reduce Fe³+ to Fe²+ to gain energy and use only CO₂ to…

A: *Microorganisms have a wide range of metabolic abilities and may adapt to different carbon and…

Q: Which of the following is/are derived from isoprene? (Select all that apply!) __ A __ B __ C __…

A: One isoprene unit is represented by C5H8 and it is also called as the hemiterpene. Biosynthesis of…

Q: 2. Explain the statement from your textbook, "Destroying them (endospores) is the goal of…

A: Sterilization in microbiology is the total elimination of all germs, including spore and vegetative…

Q: 2. Mold treated with X ray became mutated and could only grow on media supplemented with metabolites…

A: Ans- (A) 1  Enzyme 1 is lacking in the mold

Q: A disadvantage of using UV light to control microbes is: '. a. it produces irritable ozone b. it has…

A: UV rays are ultraviolet rays. These rays produce thymine dimers and disrupt DNA.

Q: What is the best method to filter the precipitate from it's reaction mixture? a Gravity filtering…

A: A product is precipitated from a reaction mixture and later collected by the process of filtration.

Q: 1. Which of the following is most likely to result in "immobilization"? A. Assimilation B.…

A: Microorganisms may cause disease in people, animals, and plants, and they are crucial to many…

Q: 5. The favorable growing conditions of a microbe is at 37°C and pH 6. Which of the following…

A: Bacteria are classified into various types based on the structure of the cell, growth temperature,…

Q: 23. Which of the following is an inorganic molecule that producers can use to make o heterotrophic…

A: Organic molecules have carbon-hydrogen bonds. These types of molecules are created by living…

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: Which of the following oxygenic phototrophs are believed to have generate the majority of oxygen gas…

A: Phototrophy is the process by which light energy is captured and transformed into chemical energy…

Q: Which of the following is not used as an antiseptic?   A. Chlorhexidine B. Phenol C. Iodophor…

A: Antiseptics are the molecules or substances which has the ability to slow down or stop the growth of…

Q: Pest Control 7.​What was DDT used for? How does DDT negatively affect top-level consumers? (Provide…

A: dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost…

Q: 10. Pharmaceutical ingredients are susceptible to microbial attack. Which ONE of the following…

A: While the final products in pharmaceutical companies and probably most chemicals in the lab may…

Q: The culture medium that contains penicillin is a type of ________media.

A: Culture media were introduced in the 19th century and have since gone on to revolutionize…

Q: What of the following types of culture media allows the growth of specific microorganisms and…

A: Culture media are solutions that provide all the nutritional and physical growth factors required…

Q: Gamma rays and X-rays are effective in killing microorganisms because they: a. damage DNA b.…

A: Answer:- b. dislodge electrons from atoms, creating ions.

Q: Prototrophs A. Can grow on complete media and minimal media B. Can grow on complete media but not…

A: Introduction Prototrops are the kind of microorganism that has the same nutritional requirements as…

Q: III. Microbes that can survive and thrive in extreme environments are known as extremophiles. In…

A: Extremophiles are organisms, typically microbes, that are capable of thriving and surviving in…

Q: Some species of algae, bacteria and shrimp can live in the Great Salt Lake in Utah. Such organisms…

A: A few bacteria, algae & brine shrimp species live in the great salt lake in Utah. They are…

Q: Why do bacteria produce exoenzymes?   2. Lipases are one of the most commonly used enzymes in…

A: Bacteria are microscopic, simple, prokaryotic organisms lacking a nucleus in the cells. These are…

Q: In relation to steps in product development in industrial microbiology explain why optimization of…

A: Fermentation is a metabolic interaction that produces synthetic changes in natural substrates…

Environmental Microbiology

Environmental biology deals with the study of microorganisms and their interaction with their surroundings. This term itself covers the microbial interactions with water, soil, air, and microbial too.