Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 22, Problem 3VCQ
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.
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In the nitrogen cycle the Assimilation process is a metabolic reaction: anabolic, catabolic, endergonic, exergonic, heterotrophic or autotrophic.
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
In terms of the nitrogen cycle and movement of electrons, what is the difference between nitrogen fixation and assimilatory nitrate reduction
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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- Figure 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_forwardFigure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardwhat happens during the process of nitrogen fixationarrow_forward
- The following carbon sources can be used for nutrition, by at least some heterotrophic organisms, except: CH3COOH CH3OH CO2 CH4 HCOOHarrow_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_forwardWhat product is generated by assimilation in the nitrogen cycle.arrow_forward
- Nitrogen fixation is carried out by.arrow_forwardE. coli cells require organic compounds, such as glucose as its carbon and energy source, and prefer to live in an fully oxygenated environment. Which of the following is the most accurate way to describe E. coli based on its trophic properties? O Chemolithoautotroph Phototroph Anaerobic bacterium O Chemoorganoheterotropharrow_forwardSoil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.arrow_forward
- what are the key chemical transformation in the nitrogen cycle and which ones are affected by human influencesarrow_forwardAll of the following carbon sources can be used for nutrition, by at least some exclusively heterotrophic organisms, with the exception of: CH3CH2OH CO2 HCOOH CH4 CH3COOHarrow_forwardWhy is nitrogen fixation so energetically costly?arrow_forward
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