17 Questions
What is the shape of Campylobacter jejuni?
Spiral shaped
Give an example of a coma-shaped bacteria.
Vibrio cholerae
Which group of bacteria is corkscrew shaped?
Spirochetes
What is the size range of most archaea?
0.1 to 15 μ diameter and up to 200 μ long
Give an example of a halophile archaeon.
Halobacterium
What type of archaeans live at extremely hot temperatures?
Thermophiles
How do Archaeans obtain energy and what molecule is formed during this process?
Archaeans obtain energy by absorbing sunlight using their membrane pigment, bacteriorhodopsin. This reaction leads to the formation of the energy molecule Adenosine Triphosphate (ATP).
Describe the locomotion and reproduction characteristics of Archaeans.
Archaeans exhibit locomotion and reproduction similar to bacteria.
What role does bacteriorhodopsin play in Archaeans' energy formation?
Bacteriorhodopsin is the membrane pigment in Archaeans that absorbs sunlight, initiating the process of energy formation.
How do Archaeans differ in using sunlight for energy compared to plants?
Archaeans use sunlight to make energy, but not in the same way as plants do.
Where do Archaeans typically grow and how do they interact with their environment?
Archaeans grow on artificial laboratory media and exhibit host interactions.
What is the size range of most bacteria?
0.2 um-100 um
What is the study of bacteria called?
Bacteriology
Describe the structure of bacteria.
Simpler cell structure without a nucleus or membrane-bound organelles.
What is the singular form of 'bacteria' referred to as?
Bacterium
What is the plural form of 'bacterium' referred to as?
Bacteria
What is an extra circle of genetic material in some bacteria called?
Plasmid
Study Notes
Bacterial Shapes
- Spiral shaped: Spirilla (Example: Campylobacter jejuni)
- Comma shaped: Vibrios (Example: Vibrio cholerae)
- Corkscrew shaped: Spirochetes (Example: Treponema pallidium)
- Round shaped: Cocci
- Rod shaped: Bacilli
Archaea
- Single cellular, microscopic organisms
- Prokaryotes
- Belong to kingdom Archaebacteria (also known as Archaea)
- Size: 0.1 to 15 μm in diameter and up to 200 μm long
Characteristics of Archaea
- Based on habitat, Archaea are divided into:
- Halophiles: live in salty environments (Example: Halobacterium)
- Methanogens: methane-producing organisms (Example: Methanococcus)
- Thermophiles: live in extremely hot temperatures (Example: Alicyclobacillus)
- Psychrophiles: cold-loving organisms (Example: Listeria monocytogenes)
Characteristics of Micro-organisms
- Prokaryotes: Bacteria and Archaea
- Eukaryotes: Protozoa and others
- Characteristics of Bacteria and Archaea
Eukaryotes vs Prokaryotes
- Major differences between prokaryotic and eukaryotic cells
Kingdoms and their Characteristics
- Characteristics of Bacteria, Archaea, and Protozoa
Test your knowledge on different bacterial shapes and their classification with this quiz. Learn about spirilla, vibrios, spirochetes, cocci, and bacilli. Explore the characteristics of Archaea as well.
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