BIOLOGY 2E
2nd Edition
ISBN: 9781506699851
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 22, Problem 18RQ
Ammonification is the process by which.
- ammonia is released during the decomposition of nitrogen-containing organic compounds
- ammonium is converted to nitrite and nitrate in soils
- nitrate from soil is transformed to gaseous nitrogen compounds such as NO, N2O, and N2
- gaseous nitrogen is fixed to yield ammonia
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If you are working at a sewage treatment plant, which microbial process(es) would you use to reduce
nitrates in sewage before releasing into rivers? Why?
denitrification; to reduce occurrence of HAB's
nitrification; to make water richer in fertilizers when used by farmers
nitroge fixiation; to increase dissolved oxygen in river water
nitirification to convert nitrates to unusable nitrites; to increase algal growth in water
Which of the following is not correct about nitrogen fixation?
Carried out only by few prokaryotic organisms termed diazotrophs
It requires metabolic energy
None of the above
Enzyme that catalyzes the reduction of nitrogen is termed as nitrogenase complex
Microbes that can survive and thrive in extreme environments are
called extremophiles. In this context, what term is the most
accurate to describe the microbes that can grow in salty
wastewater?
Acidophiles
Psychrophiles
Thermophiles
O Halophiles
Chapter 22 Solutions
BIOLOGY 2E
Ch. 22 - Figure 22.8 Compared to free-floating bacteria,...Ch. 22 - Figure 22.16 Which of the following statements is...Ch. 22 - Figure 22.19 Which of the following statements...Ch. 22 - The first forms of life on Earth were thought to...Ch. 22 - Microbial mats. are the earliest forms of life on...Ch. 22 - The first organisms that oxygenated the atmosphere...Ch. 22 - Halophiles are organisms that require a salt...Ch. 22 - Many of the first prokaryotes to be cultured in a...Ch. 22 - The presence of a membrane-enclosed nucleus is a...Ch. 22 - Which of the following consist of prokaryotic...
Ch. 22 - The cell wall is ___________ . interior to the...Ch. 22 - Organisms most likely to be found in extreme...Ch. 22 - Prokaryotes stain as Gram-positive or Gramnegative...Ch. 22 - Pseudopeptidoglycan is a characteristic of the...Ch. 22 - The lipopolysaccharide layer (LPS) is a...Ch. 22 - Which of the following elements is not a...Ch. 22 - Prokaryotes that obtain their energy from chemical...Ch. 22 - Ammonification is the process by which. ammonia is...Ch. 22 - Plants use carbon dioxide from the air and are...Ch. 22 - Cyanobacteria harness energy from the sun through...Ch. 22 - A disease that is constantly present in a...Ch. 22 - Which of the statements about biofilms is...Ch. 22 - Which of these statements is true? An antibiotic...Ch. 22 - A person in England arrives at a medical clinic...Ch. 22 - MRSA has emerged as a serious infectious disease,...Ch. 22 - Which of these occurs through symbiotic nitrogen...Ch. 22 - Synthetic compounds found in an organism but not...Ch. 22 - Bioremediation includes. the use of prokaryotes...Ch. 22 - In addition to providing yogurt with its unique...Ch. 22 - Describe briefly how you would detect the presence...Ch. 22 - Why do scientists believe that the first organisms...Ch. 22 - A new bacterial species is discovered and...Ch. 22 - Mention three differences between bacteria and...Ch. 22 - Explain the statement that both types, bacteria...Ch. 22 - A scientist isolates a new species of prokaryote...Ch. 22 - Think about the conditions (temperature, light,...Ch. 22 - Farmers continually rotate the crops grown in...Ch. 22 - Imagine a region of soil became contaminated,...Ch. 22 - Explain the reason why the imprudent and excessive...Ch. 22 - Researchers have discovered that washing spinach...Ch. 22 - Your friend believes that prokaryotes are always...Ch. 22 - Many people use antimicrobial soap to kill...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Figure 22.19 Which of the following statements about the nitrogen cycle is false? Nitrogen fixing bacteria exist on the root nodules of legumes and in the soil. Denitrifying bacteria convert nitrates (NO3 ) into nitrogen gas (N2). Ammonification is the process by which ammonium ion (NH4+) is released from decomposing organic compounds. Nitrification is the process by which nitrites (NO2-) are converted to ammonium ion (NH4+).arrow_forwardWhy do raw household ingredients such as granulated sugar and cooking oils never go bad in normal conditions? Extrinsic factors (room temperature) These foods have a very low Aw ph of these ingredients is too low to support spoilage organisms They do spoilarrow_forwardThe soil bacterium Azotobacter can be enriched from soil using liquid media, which must contain the following Mannitol Nitrate (NO3-) Amino Acids Ammonia (NH4+) All the abovearrow_forward
- If you are working at a sewage treatment plant, which microbial process would you use to reduce nitrates in sewage before releasing into rivers? Why? O nitirification to convert nitrates to unusable nitrites; to increase algal growth in water O denitrification; to reduce HAB's O nitroge fixiation; to increase dissolved oxygen in river water nitrification; to make water richer in fertilizers when used by farmersarrow_forwardWhich of the following apply to silver as a chemical inhibitor of microbial growth? Acts as a competitive inhibitor Mimics the natural substrate O Binds nonspecifically to many proteins Irreversibly binds to proteins through covalent bond Will only bind to the active site Disrupts tertiary and quaternary protein structure Can safely and effectively be used to inhibit biofilm Alters the shape of the active sitearrow_forwardIf an organism tests positive for catalase, which of the following is MOST likely true about the organism? It can only do homolactic fermentation It returns nitrogen back to the atmosphere It can break down plasma membranes It creates H2O as a product of respirationarrow_forward
- Which of the following terms is NOT used to describe microbes thrive in different temperature ranges? Thermophiles Psychrophiles O Mesophiles O Halophilesarrow_forwardFigure 46.17 Which of the following statements about the nitrogen cycle is false? Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+). Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2). Nitrification by bacteria converts nitrates (NO3 ) to nitrites (NO2-). Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardWhich of the following carbon-containing compounds is used by an Autotrophic bacterium as its carbon source? Acetic acid (C₂H4O2) Glucose (C6H12O6) CO₂ gas Ethanol (C₂H6O)arrow_forward
- Which of the following microbes grow best below 20 degrees C? thermophiles mesophiles hyperthermophiles psychrophilesarrow_forwardWhich of the following is NOT true about chemoheterotrophs? Which of the following is NOT true about chemoheterotrophs? Use organic compounds as a source of both carbon and energy Can use light for energy and CO2 as a source of carbon Oxidize organic compounds (e.g., glucose) to generate ATP They are ultimately dependent on autotrophs to provide their carbon and energy None of the other four answers (all are true of chemoheterotrophs)arrow_forwardSalts and sugars work to preserve food by O creating an acidic environment denaturing proteins making the environment anaerobic Omaking water osmotically unavailablearrow_forward
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