29 Questions
What is the correct definition of an antibiotic?
Any substance produced by an organism that is antagonistic to the growth of prokaryotes.
What are plasmids composed of?
Nucleic acids
How does antibiotic resistance develop in bacteria?
i and ii
What type of cells do you obtain after a F+ bacterium conjugates with a F- bacterium?
Two F+ bacteria with identical plasmid but not chromosomal DNA
How do Gram-positive bacteria appear in Gram staining?
Purple
What term best describes Porphyromonas gingivalis, a Gram-negative bacterium?
Anaerobic
What is the classification of the majority of prokaryotes?
Heterotrophs
Which organelle is typically absent in prokaryotic cells?
Mitochondria
What is the characteristic of DNA structure in both Eubacteria and Archaea?
Both have circular DNA
What is a characteristic of microbial mats?
They are the earliest forms of life on Earth
What is a characteristic of Halophiles?
They require a salt concentration of at least 2.0 M
Which group of organisms is characterized by the presence of pseudo peptidoglycan in their cell walls?
Archaea
What type of prokaryotes are unable to grow in a laboratory setting?
Prokaryotes that cannot grow in a laboratory setting
Which type of interaction between two prokaryotic populations benefits one population and does not affect the other?
Commensalism
Which type of bacteria is responsible for nitrogen fixation?
Cyanobacteria
What process occurs during binary fission in prokaryotic cells?
Binary fission
What is an example of horizontal gene transfer in prokaryotic reproduction?
Conjugation
Which of the following species is NOT a Gamma proteobacterium?
Mycobacterium
Which type of anaerobic prokaryote can survive in the presence of oxygen but does not use it for metabolism?
Aerotolerant anaerobic
Which prokaryote is responsible for causing the Black Death plague?
Yersinia pestis
Which of the following is a primary mode of transmission for pathogenic prokaryotes?
Contaminated food and water
Which beneficial prokaryote is commonly used in the production of dairy products?
Lactobacillus acidophilus
Which group of prokaryotes is responsible for the production of antibiotics?
Actinobacteria
Which of the following is an example of prokaryotes playing a role in carbon sequestration?
Methanogenic archaea converting organic matter into methane gas
What is the role of nitrifying bacteria in the nitrogen cycle?
They convert ammonia (NH3) or ammonium (NH4+) into nitrites (NO2-) and nitrates (NO3-)
What organelle did aerobic prokaryotes evolve to become in eukaryotic cells?
mitochondria
Why did chloroplast likely evolve before mitochondria?
Because photosynthesis is necessary for the production of oxygen required for aerobic respiration
What were bacteria collectively referred to as before Carl Woese defined Eubacteria and Archaebacteria?
Monera
What is the correct statement about the relationship between photosynthesis and aerobic respiration?
Photosynthesis is necessary for aerobic respiration
Test your knowledge of prokaryotes, including their classification, cellular structure, and DNA characteristics. This quiz covers the basics of prokaryotic cells, including autotrophs, heterotrophs, and chemotrophs.
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