biology

Varicellovirus

Varicellovirus 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 Varicellovirus rather than just read about it. In short: Varicellovirus (var′i-sel′ō-vi′rŭs) is a genus of viruses belonging to subfamily Alphaherpesvirinae, a member of family Orthoherpesviridae. Humans and other mammals serve as natural hosts.

Key takeaways

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

Reference excerpt

Varicellovirus (var′i-sel′ō-vi′rŭs) is a genus of viruses belonging to subfamily Alphaherpesvirinae, a member of family Orthoherpesviridae. Humans and other mammals serve as natural hosts. Diseases associated with this genus include: HHV-3—chickenpox (varicella) and shingles; BoHV-1—infectious bovine rhinotracheitis/infectious pustular vulvovaginitis (IPV); and SuHV-1 (also known as pseudorabies virus)—Aujesky's disease.

Species The genus contains the following species, listed by scientific name and followed by the common name of the species:

Structure As with other alphaherpesviruses, the virus particle has a layered structure: Virions consist of an envelope, a tegument, a nucleocapsid, and a core. Tegument is disordered; they do not display a structure and proteins in variable amounts are arranged sometimes in an asymmetric layer located between envelope and capsid. The viral capsid is contained within a spherical envelope which is 120–200 nm in diameter. Surface projections on envelope (viral receptors) are densely dispersed and contain small spikes that evenly dot the surface. The capsid/nucleocapsid is round with triangulation number T=16 and exhibits icosahedral symmetry. The capsid is isometric and has a diameter of 100–110 nm. The capsid consists of 162 capsomer proteins with a hexagonal base and a hole running halfway down the long axis. The core consists of a fibrillar spool on which the DNA is wrapped. The end of the fibers are anchored to the underside of the capsid shell. It is a double-stranded enveloped DNA virus

Life cycle Viral replication is nuclear, and is lysogenic. Entry into the host cell is achieved by attachment of the viral glycoproteins to host receptors, which mediates endocytosis. Replication follows the dsDNA bidirectional replication model. DNA-templated transcription, with some alternative splicing mechanism is the method of transcription. The virus exits the host cell by nuclear egress, and budding. Humans and mammals serve as the natural host. Only one member of the Varicellovirus genus, Varicella zoster virus (HHV-3) infects Homo sapiens (humans).

References

External links

Virus Pathogen Database and Analysis Resource (ViPR): Herpesviridae Viralzone: Varicellovirus ICTV

Worked examples

Example 1 — a first encounter with Varicellovirus

Start with the simplest possible case. Write down what Varicellovirus 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 Varicellovirus 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 Varicellovirus 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 Varicellovirus

In research: Varicellovirus 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 Varicellovirus 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: Varicellovirus is common in secondary-school and first-year university syllabi. It links to neighbouring topics Varicelloviruses, Virus genera, so understanding it makes those chapters shorter.
In everyday life: Look for Varicellovirus 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 Varicellovirus in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Varicellovirus 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 Varicellovirus out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Varicellovirus in simple terms?

Varicellovirus (var′i-sel′ō-vi′rŭs) is a genus of viruses belonging to subfamily Alphaherpesvirinae, a member of family Orthoherpesviridae. Humans and other mammals serve as natural hosts.

Why does Varicellovirus 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 Varicellovirus?

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 Varicellovirus.