Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 22, Problem 41CTQ
Your friend believes that prokaryotes are always detrimental and pathogenic. How would you explain to them that they are wrong?
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Draw a prokaryotic cell and show the different target parts of the cell where antibiotics can attack. Give an example of the antibiotic that attack these parts.
schematic drawing will do, I can just draw it on my own
Microbiologists have announced the discovery of over 30 new species of bacteria that thrive between the teeth and gums of humans. The bacteria could not be grown in the researcher's laboratories, nor were any of them ever observed via and kind of microscopy.
If they couldn't culture them or see them, how could the researchers know they discovered a new species? If they couldn't examine the cells for the presence of a nucleus, how did they determine that the organisms were prokaryotes and not eukaryotes?
Why do some microbiologists disagree with classifying bacteria and archaea as “prokaryotes”?
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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- If all prokaryotes were eliminated from the planeta) animals would thrive because there would be no disease.b) archaea would thrive because there would be no competition for nutrients.c) all animals would die.d) animals and archaea would thrive.arrow_forwardWhich of the following describe prokaryotes? a) usually have a circular chromosome b) typically have multiple chromosomes c) are usually diploid d) none of the abovearrow_forwardWhy are prokaryotes so abundant and have such high diversity?arrow_forward
- What are two ways that some prokaryotes are able to survive in extreme environments?arrow_forwardWhy is the term prokaryote considered an inadequate descriptor by some microbiologists?arrow_forwardWe have prokaryotes in our intestines? What do they do for us? What do we have to do for them?arrow_forward
- What role does the human microfauna play in protecting humans against pathogens? (At this point in the class, you should be able to provide a detailed list of activities bacteria species perform in and on our body that protect us from pathogens.)arrow_forward1.) Your roommate has noticed that you now spend most of your time studying microbiology and has become curious about the subject. She asks you to explain in the simplest possible way how prokaryotes differ from eukaryotes. What do you tell her? 2.) In the advent of COVID-19, what physical method and chemical agent do you think is the most effective method in controlling the spread of the disease? Justify your answer.arrow_forwardA scientist isolates a new species of prokaryote. He notes that the specimen is a bacillus with a lipid bilayer and cell wall that stains positive for peptidoglycan. Its circular chromosome replicates from a single origin of replication. Is the specimen most likely an Archaea, a Gram-positive bacterium, or a Gram-negative bacterium? How do you know?arrow_forward
- The peptidoglycan region in archaea is connected to each other by a: a) tetrapeptide b) Teichoic Acid c) Lipoteichoic acid d) all of the above e) none of the abovearrow_forwardIn terms of microbial pathogenicity, molecular Koch's postulates are a set of experimental criteria that show: A microbe is the aetiological agent of a disease A gene encodes a product that contributes to disease A gene encodes a product that contributes to immunity to a disease A mutation does not contribute to diseasearrow_forwardThese structures allow bacteria to have reserve deposits of lipids or gasses. O a) inclusions Ob) ribosomes Oc) endosporesarrow_forward
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