biology

Sukunaarchaeum

Sukunaarchaeum is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sukunaarchaeum rather than just read about it. In short: "Candidatus Sukunaarchaeum mirabile" (provisional name) is a species of archaea of which only the DNA is known, but which already presents several particularities: it is a holoparasite of the dinoflagellate Citharistes regius. Its DNA, the smallest known for an archaeon, codes only for proteins necessary for reproduction.

Key takeaways

Sukunaarchaeum belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sukunaarchaeum to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sukunaarchaeum from memory before moving on to harder problems.

Reference excerpt

"Candidatus Sukunaarchaeum mirabile" (provisional name) is a species of archaea of which only the DNA is known, but which already presents several particularities: it is a holoparasite of the dinoflagellate Citharistes regius. Its DNA, the smallest known for an archaeon, codes only for proteins necessary for reproduction.

Discovery and naming The proposed name for the genus, "Ca. Sukunaarchaeum", is a reference to Sukunabikona ("renowned little lord"), a small Shinto deity associated with hot springs. The specific epithet, mirabile, means "astonishing, admirable, marvelous."

Features The DNA of "Ca. Sukunaarchaeum mirabile" is a circular molecule comprising 238 kilobase pairs (kbp), less than half the size of the smallest previously known archaeal DNA. This genome lacks almost all recognizable metabolic pathways, and primarily encodes the mechanisms of DNA replication, transcription, and translation. This suggests an unprecedented level of metabolic dependence on the host, a condition that challenges functional distinctions between minimal cellular life and viruses. Unlike viruses, "Ca. Sukunaarchaeum mirabile" has the ability to replicate its DNA, whereas viruses depend completely on their host organisms for replication.

See also Smallest organisms Symbiogenesis

References

Worked examples

Example 1 — a first encounter with Sukunaarchaeum

Start with the simplest possible case. Write down what Sukunaarchaeum claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sukunaarchaeum before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sukunaarchaeum ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sukunaarchaeum

In research: Sukunaarchaeum appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sukunaarchaeum in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sukunaarchaeum is common in secondary-school and first-year university syllabi. It links to neighbouring topics Archaea described in 2025, Archaea stubs, Candidatus taxa, so understanding it makes those chapters shorter.
In everyday life: Look for Sukunaarchaeum outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sukunaarchaeum in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sukunaarchaeum means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sukunaarchaeum out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sukunaarchaeum in simple terms?

Why does Sukunaarchaeum matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sukunaarchaeum?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sukunaarchaeum.