Dissimılatory nitrate reduction carried out by bacteria can lead to loss of nitrogen as N2 from the environment. A) O True B) O False

Q: Microorganisms are often grouped according to their optimum growth temperatures. Which groups are…

A: Bacteria spoil refrigerated foods.

Q: enrichment culture to isolate aerobic and anaerobic nitrogen-fixing bacteria, sulfate-reducing…

A: Enrichment culture:  This type of culture containing  certain growth media ,allows  and  favours the…

Q: You are now working in the Research and Development Department of a start-up company that…

A: Sterilization is the physical or chemical process that is used to destroy all life forms especially…

Q: Define nitrogen fixation. What organisms are capable of nitrogen fixation?

A: Nitrohen fixation is a biochemical process for the utilization of atmospheric nitrogen gas. The…

Q: The autotrophic mode of nutrition requires:a) Chlorophyllb) Sunlightc) Carbon – dioxide &…

A: Organisms need food for their growth and survival. There are 3 modes of nutrition- autotrophic…

Q: Which of these are known to host chemosynthetic communities? a) Hydrothermal vent O b) Hydrocarbon…

A: The food chain in our ecosystem depends on the primary producers as they are capable of harvesting…

Q: A batch reactor was initially filled with organic substrate (S0) with an equivalent concentration of…

A: Bioreactor is the equipment used for the production of biomass. Cells consume substrate and multiply…

Q: Some suggest that lakes without fish populations due to acid depostiion can simply be stocked with…

A: The impact of acid deposition on aquatic ecosystems, particularly lakes, is a significant…

Q: Most human bacterial pathogens are labeled as __ according to their temperature requirement: a)…

A: Microorganisms known as mesophiles thrive in habitats with moderate temperatures, often between 20°C…

Q: After comparing the growths on the two plates of Brewer’s anaerobic agar with the growths in the six…

A: Anaerobic agar is used for anaerobic microorganisms cultivation. The anaerobic bacteria are not…

Q: What is the logic behind testing for E. coli to detect fecalcontamination of water?

A: Bacteria are unicellular prokaryotic organism that maintains a definite shape since it contains the…

Q: Which of the following is a characteristic of fecal coliforms?   Question 10 options:   A)…

A: The presence of fecal coliform bacteria indicates that the water has been contaminated by human…

Q: In the exponential phase of microbial growth, Log cell numbers Time 1 1 1 1 1 1 I 1 1 a) net cell…

A: Microbial growth curveThe microbial growth curve shows the pattern of microbial growth.There are…

Q: a) What is the consequence of discharging larger volumes of sewage that is untreated into a river?…

A: Introduction: Wastewater treatment has been used for a variety of purposes such as removing the…

Q: In microbiology, the term growth in a culture usually refers to an increase in O 1) the number and…

A: Microbes are the microscopic appearance creatures that are not visible to the naked eye. These…

Q: Why canal/pond water supports growth and development of microbes?

A: Introduction  Habitat is referred to the place where any species resides. This can be any…

Q: Which of the following methods of control kills the microbe? a) incineration b) desiccation c)…

A: Introduction Microorganisms are referred to as that organism that is single-celled and can only be…

Q: Describe nitrogen fi xation, ammonifi cation, nitrifi cation, and denitrifi cation and how microbes…

A: The process of reduction of molecular nitrogen into ammonia is called nitrogen fixation. It can…

Q: Salts and sugars work to preserve foods by creating a:   Question 6 options:   A)  depletion of…

A: Protection of foods by salt (usually sodium chloride) or Sugar (usually sucrose) from…

Q: Why does secondary treatment of wastewater require O2?

A: Secondary treatment is a part of wastewater disposal system, where the sewage or other waste waters…

Q: A bacterial organism is used to inoculate mannitol broth medium. Following incubation the broth is…

A: A nutrient growth medium is a type of solution or mixture that is designed to provide nutrients to…

Q: The greastes effect that hmans have on the carbon cycle derives from A) the production of methane…

A: There are resources in nature that occur without any interference or action of humankind, such…

Q: What product is generated by assimilation in the nitrogen cycle.

A: Assimilation is the process by which plants and animals incorporate the ammonia and NO3  that are…

Q: Are coliform bacteria dangerous in the water?

A: Coliforms are bacteria that are always present in the digestive tracts of animals, including humans,…

Q: What is a generally minimum pH for growth and toxin production by Clostridium botulinum and other…

A: Clostridium botulinum is a Gram-positive, rod-shaped, anaerobic, spore-forming, motile bacteria that…

Q: Atmospheric nitrogen can be useda) directly by all living organisms.b) only by aerobic bacteria.c)…

A: Nitrogen is a key macronutrient across all organisms. It is the primary component of the nucleic…

Q: Which is true regarding bacterial and archaea species that use nitrogen and sulfur compounds in…

A: Microbes primarily bacteria utilize nitrogen or sulfur compounds as part of their metabolic activity…

Q: The generation time of a bacterium was measured at two different temperatures. Which results would…

A: The small microscopic, unicellular organisms that are generally not visible to the naked eye are…

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: fertilizers

A: In various regions with distinct geographic characteristics, fertilizers containing zinc have been…

Q: Write down two differences between bioaccumulation and Efflux pump mediated heavy metal removal by…

A: Metals that are relatively dense are heavy metals and even the presence of the slightest…

Q: Which of the following species of microbe is associated withbeing a good indicator of fecal…

A: The correct answer is (e) Salmonella typhi

Q: Microorganisms are needed in wastewater treatment facility to do the actual breakdown and removal of…

A: Wastewater or sewage is treated by a consortium of aerobic and anaerobic microorganisms. Aerobic…

Q: neration time of the species is 1 hour, and the microbes are in the exponential (log) hase of…

A: Microorganism that experience exponential growth its number increases according to this equation…

Q: Benzoic acid is an antimicrobial chemical naturally found inwhich of the following foods?a) Apples…

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

Q: Which process converts ammonium (NH4+ ) into nitrate (NO3− )?a) Nitrogen fixationb) Ammonificationc)…

A: Nitrite removal is even easier, with nitrite being oxidized by the enzyme nitrite oxidoreductase and…

Q: Tilogell gas ng hitrate to nitrite 15. Denitrifying bacteria need which of the following conditions…

A: According to the guidelines we have to answer first 1-2 question rest you can ask separately thank…

Q: (i) Discuss the spoilage processes by determining THREE (3) potential intrinsic factors that are…

A: Meat is rich in protein, and fat, and is a very nutritious food. It is obtained from various sources…

Q: can you Explain in 1000 words, the role of sewage treatment in hospitals?

A: The operation of a sewage remedy plant approach that you could have one hooked up nearly anywhere,…

Q: What are the characteristics of an effective indicator organism? Write down some examples. Suppose…

A: Characteristics: It should have the same resistance to environmental stress as that of pathogens. It…

Q: Which of the following could be an effect of an excess ofsewage running into a freshwater…

A: Due to the contamination of fresh water by sewage all of the above can takes place.

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.