Archaea and Bacteria Quiz: Exploring the Prokaryotic Domains

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| Questions: 18 | Updated: Oct 31, 2025
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1. Define Prokaryotes.

Explanation

Prokaryotes are simple organisms that lack a true nucleus or any other organelle surrounded by a membrane, distinguishing them from eukaryotes. The correct answer highlights this key characteristic of prokaryotic cells.

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About This Quiz
Prokaryotic Cells Quizzes & Trivia

Explore the fascinating world of Archaea and Bacteria through this focused review. Understand the unique characteristics and ecological roles of these prokaryotes, enhancing your knowledge in microbiology and its practical applications.

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2. Define Eukaryotes.

Explanation

Eukaryotes are organisms that have a true nucleus and various organelles enclosed by membranes, distinguishing them from prokaryotic organisms. The incorrect answers incorrectly describe characteristics of other types of organisms.

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3. To which domain do Archaeans belong?

Explanation

Archaean organisms belong to the domain Archaea, which is distinct from the domains Bacteria, Eukarya, and Protista.

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4. To which domain do true bacteria belong?

Explanation

True bacteria, also known as Eubacteria, belong to the Domain Bacteria, which is one of the three domains of life. Domain Archaea is another domain of prokaryotic microorganisms, Domain Eukarya includes all eukaryotic organisms, and Domain Protista is an outdated kingdom that has been replaced by more specific domains and kingdoms.

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5. What shape is a Coccus?

Explanation

Coccus is a spherical or round shape, commonly seen in bacteria.

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6. What shape is a bacillus?

Explanation

Bacillus bacteria are rod-shaped, cylindrical bacteria that are commonly found in soil and water. They are characterized by their elongated shape and are known for their ability to produce endospores.

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7. What shape is a spirillum bacterium?

Explanation

Spirillum bacteria are spiral-shaped and have a helical, corkscrew or curved rod shape, hence the name 'spirillum'.

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8. What is the specific biological term for when these bacteria are seen clustering in pairs?

Explanation

When bacteria cluster in pairs, the specific biological term used is diplo-. This term is used to describe the arrangement of bacterial cells when they form pairs or clusters of two.

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9. What term is used to describe the grouping of these bacteria together?

Explanation

The correct term for the grouping of these bacteria together is staphylospecifically staphylococcus.

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10. What is biofilm?

Explanation

Biofilm refers to a community of bacteria that adhere to a surface and secrete a slimy, adhesive substance that acts as a protective layer.

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11. What is the subgroup of these organisms that can also photosynthesize in a manner similar to plants? What Domain are they a part of?

Explanation

Cyanobacteria are a subgroup of organisms that can photosynthesize like plants and belong to Domain Bacteria. Archaea belong to Domain Archaea which typically includes extremophiles. Protists and Fungi are both part of Domain Eukarya, but they do not photosynthesize in the same manner as Cyanobacteria.

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12. What bacteria is this? Where are the heterocysts and the spores?

Explanation

Anabaena is a genus of filamentous cyanobacteria known for its ability to fix nitrogen. Heterocysts, specialized cells for nitrogen fixation, can be found in these filaments. Spores are typically formed at the terminus of the filaments in some species of Anabaena.

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13. What is fragmentation?

Explanation

Fragmentation specifically refers to the splitting of a colony of cells into smaller pieces, each having the potential to develop into a new colony.

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14. What are separation discs?

Explanation

The correct answer refers to a specific biological term related to blue-green algae.

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15. What are antibiotics?

Explanation

Antibiotics are specifically designed to target and kill bacteria or inhibit their growth, making them ineffective against viruses. They work by interfering with essential processes in bacterial cells.

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16. What are natural antibiotics?

Explanation

Natural antibiotics are substances found in nature that have antimicrobial properties. Examples include Penicillin, which is derived from a type of mold, making it a natural antibiotic.

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17. What are synthetic antibiotics?

Explanation

Synthetic antibiotics refer to substances that are artificially created in a laboratory setting to combat bacterial infections. Unlike natural remedies, homeopathic remedies, or herbal supplements, synthetic antibiotics are specifically designed and manufactured to target and eliminate harmful bacteria.

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18. What are semi-synthetic antibiotics?

Explanation

Semi-synthetic antibiotics are created by chemically modifying natural antibiotics to improve their effectiveness or overcome bacterial resistance. They are not entirely synthetic nor extracted directly from natural sources without modification. Additionally, antibiotics do not work against viral infections.

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  • Answered
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Define Prokaryotes.
Define Eukaryotes.
To which domain do Archaeans belong?
To which domain do true bacteria belong?
What shape is a Coccus?
What shape is a bacillus?
What shape is a spirillum bacterium?
What is the specific biological term for when these bacteria are seen...
What term is used to describe the grouping of these bacteria together?
What is biofilm?
What is the subgroup of these organisms that can also photosynthesize...
What bacteria is this? Where are the heterocysts and the spores?
What is fragmentation?
What are separation discs?
What are antibiotics?
What are natural antibiotics?
What are synthetic antibiotics?
What are semi-synthetic antibiotics?
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