28 Questions
What are prokaryotes?
Single-celled organisms that make up domains Bacteria and Archaea
How do prokaryotic cells compare to eukaryotic cells in terms of size and complexity?
Prokaryotic cells are generally smaller and simpler than eukaryotic cells
Which of the following is a characteristic of prokaryotic cells that allows them to reproduce quickly?
Smaller and simpler structure
Why are prokaryotes considered an extremely successful group of organisms?
They are well adapted to diverse environments
What type of environment would thermoacidophiles thrive in?
Extremely hot and acidic environments like hot springs
What are the three most common shapes of prokaryotic cells as mentioned in the text?
Rods, spheres, spirals
What distinguishes the membrane type of bacteria through Gram-staining?
Outer cell wall strengthened by peptidoglycan
What is a characteristic feature of motile bacteria mentioned in the text?
Absence of flagella
What is a distinguishing feature between bacterial and eukaryotic cell walls?
Presence of peptidoglycan in bacterial cell walls
What distinguishes the way bacteria and Archaea strengthen their outer cell walls?
Archaeal walls contain no peptidoglycan
What is the size range of prokaryotic cells compared to eukaryotic cells as mentioned in the text?
Prokaryotic cells are much smaller than eukaryotic cells
What is the main function of nitrogen-fixing bacteria in the context of the text?
Convert N2 into a form usable by plants
Which bacterial process involves converting organic material into ammonia or ammonium?
Ammonification
What is the purpose of the nodules on the roots of legumes?
Host mutualistic bacteria involved in nitrogen fixation
Which bacterial structure enables DNA transfer during conjugation?
Fimbriae
What is the purpose of endospores produced by bacteria?
Survival in harsh conditions
How do most bacteria reproduce asexually?
Through binary fission
What can bacteria be used for in bioremediation?
To remove pollutants from the environment
Which type of molecules are toxins produced by pathogens?
Small organic molecules
What is the primary function of antibiotics in combating bacterial diseases?
Inhibit protein synthesis
Which bacterium is responsible for causing tetanus?
Clostridium tetani
What is the primary source of most antibiotics discovered?
Soil bacteria
What is the role of Prokaryotes in bioremediation?
Removing pollutants from the environment
In a symbiotic relationship where one organism benefits while neither harming nor helping the other significantly, it is an example of:
Commensalism
How do beneficial bacteria contribute to human health?
By breaking down undigested food in our intestines
What is the role of pathogens among prokaryotes?
Causing diseases and harming hosts
How have prokaryotes contributed to advancements in DNA technology?
Through experiments leading to important advances in DNA technology
What role do bacteria play in food science and biotechnology?
They contribute to fermentation processes like producing lactic acid
Test your knowledge on how bacteria participate in the nitrogen cycle by converting atmospheric Nā into a form usable by plants, such as ammonia (NH3), with processes like nitrogen fixation, nitrification, and denitrification.
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