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: 2. Which of the following infectious agents is correctly defined as a viral pollutant? A. the human…

A: There are many sources of pollution. Viral pollutants are biological pollutants in which viruses act…

Q: A mixture of sand and organic matter is poured with a solution containing a positive dye (violet),…

A: C. The leachate has the same color (violet) with that of the dye used   cause the organic matter…

Q: 7. Give Brief explanation of Phase I reactions of detoxification.

A: Detoxification is a vital process that the body undergoes to eliminate harmful substances or…

Q: A cell suspension that is more turbid than another cell suspension (of the same cell type and media)…

A: Cell is the fundamental unit of life. It comprises of macronutrients such as carbohydrates,…

Q: 7. Oxygenic photosynthesis, which generates oxygen gas in the presence of sunlight, is used by all…

A: Photosynthesis is a process in which the photosynthesis organisms like plants and some bacteria use…

Q: Which of the following microbes produces a natural biopesticide?a. Penicillium chrysogenum b.…

A: Biological pesticides are otherwise known as biopesticides and refer to the unique type of pest…

Q: An obligate anaerobe A   has the necessary enzymes to process toxic oxygen products B   does not…

A: An organism is a living thing that refers to prokaryotes (bacteria and archaea) and eukaryotes…

Q: What is the proper position for using an incentive Spiro Meter?

A: A spirometer is a medical device used for measuring lung function and assessing respiratory health.…

Q: 2. What are the mechanisms involved in which nitrogen moves from the atmosphere into the terrestrial…

A: After carbon and oxygen, N is the abundant element and forms a important component of plant amino…

Q: ...means degrading/removing environmental poisons or pollutants by microorganisms such as fungi

A: Bioremediation

Q: Cells of the A2 subgroup will: a. React with Dolichos biflorus O b. React with anti-B O c. React…

A: Diploid organisms contain two copies of each gene from two copies of chromosomes. One set of…

Q: he following essential oil helps calm nervous energy and worry - it calms the mind and body: Choose…

A: Peppermint Oil • it is used for headaches, muscle aches, joint pain and itching  • it is also used…

Q: Which of the following control achieves destruction of all forms of life? O a. Disinfection O b.…

A: Life exists in several forms ranging from the unicellular prokaryotes like the single celled…

Q: 6. Why honey diastase activity must be controlled?

A: It is an enzyme found in the honey. It is naturally found and degrades over time. It degrades faster…

Q: 4. Identify the organic carbon-containing product which is generated by the green sulfur bacteria…

A: Green sulphur bacteria is a bacteria which shows anoxygenic photosynthesis; i.e during the…

Q: Many antibacterial hand soaps contain the chemical agent _____ , which belongs to the _____…

A: Sodium hypochlorite is commonly used chemical agent in mildew remover for prevention of infection…

Q: UV light is able to damage bacterial cells by:a. preventing mitosis b. damaging DNA c. dissolving…

A: UV stands for Ultraviolet rays. These rays kill bacterial cells.

Q: 7. The surgeon used a 70% solution of ethyl alcohol to treat the hands before surgery. What is the…

A: 70% ethyl alcohol is used to sanitize the hands and hence, is used by the surgeon before the…

Q: When a soil whose exchange sites were saturated with Ca++ is tested for pH using a litmus paper,…

A: * The answer of this question is option C that is Red litmus paper turns blue. * Red litmus paper…

Q: A microbiology professor noted that in the fall when the apples are ripe, her cow, appropriately…

A: Alcohol fermentation is the anaerobic process of conversion of sugars into alcohol (ethanol) and…

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: 1. What attributes would a microbe need (physical or biochemical) to be able to:   a. Travel from…

A: Microbes are small, unicellular, and microscopic organisms. They can be bacteria, viruses, or fungi.…

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…

Q: Patients suffering from PKU cannot properly catabolize: A、Pterin B、Phenylalanine C、Proline…

A: Phenylketonuria : PKU Asked : Patient with PKU can't catabolise which of the given compound.

Q: 1. Explain why egg white and milk are used as antidotes in heavy metal poisoning. 2. Surgical…

A: 1. The egg white and milk are used as antidotes for heavy metal poisoning because the egg white and…

Q: 6. Why is silver nitrate used in cauterization of wounds?

A: Cauterization is a medical technique used to remove or close off a part of it. Silver nitrate is…

Q: Hydrophillic is the following: O a. Water Loving or Water Attracting O b. Water Repelling O c. Polar…

A: Introduction :- An object that is attracted to water molecules and has a propensity to dissolve in…

Q: of biodegradation of organic contaminants. I

A:

Q: Phycoerythrin            A. Chromista 2. Phycocyanin              B. mangosteen 3. Flavonoids…

A: Phycoerythrin is a red protein-pigment complex from the light-harvesting phycobiliprotein family,…

Q: A microbe causing a bloodstream infection is likely all of the following except

A: Certain bacteria can lead to bloodstream infections causing septicemia. It may use an external route…

Q: All of the following are cofactors of SOD (superoxide dismutase) EXCEPT? A. Zinc B. Maganese C.…

A: Introduction The enzyme superoxide dismutase catalyses the dismutation (or partitioning) of the…

Q: How can you explain new developments in the separation of natural products

A: Nature has a hoard of natural products that have multiple essential properties such as…

Q: 1. Define Agricultural and Biological materials? 2. Why do we need to study the properties of…

A: Biological tissues are viscoelastic materials; their conduct is both gooey (viscous), which means…

Q: What are your thoughts in using a new biodegradeable product made out of seaweeds and functions as a…

A: Biodegradable means to the ability of things to get decomposed easily by the action of…

Q: Kalabasa Sibuyas Bawang Cucurbita moschata Allium cepa Allium sativum Immatory

A: Some parts have been answered here. Please ask of other parts separately.   Given here are some…

Q: when a soil whose exchange sites were saturated with H+ is tested for pH using a litmus paper, what…

A: Acid Turns blue litmus red. Based turns red litmus blue.

Q: 7. A thermometer reading 75°F is taken out where the temperature is 20°F. The reading is 30°F, 4…

A: The thermodynamic temperature (also called average kinetic energy) measures the average energy of…

Q: Biofilm is:

A: a) Biofilm is: a) a complex established community of microorganisms on solid surfaces   Explanation:…

Q: Farmers often spray spores of which bacterial species that make a protein toxic only to some insect…

A: As we know that through genetic engineering it is possible to develop crops that are resistance to…

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.