science

Iflaviridae

Iflaviridae is a science 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 Iflaviridae rather than just read about it. In short: Iflaviridae is a family of positive sense RNA viruses insect-infecting viruses. Some of the insects commonly infected by iflaviruses include aphids, leafhoppers, flies, bees, ants, silkworms and wasps.

Key takeaways

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

Reference excerpt

Iflaviridae is a family of positive sense RNA viruses insect-infecting viruses. Some of the insects commonly infected by iflaviruses include aphids, leafhoppers, flies, bees, ants, silkworms and wasps. The name "Ifla" is derived from the name "Infectious flacherie virus", a member species. There is one genus (Iflavirus) and 16 species in this family.

Structure

Members of this family are insect-infecting viruses that consist of positive single-strand RNA genomes translated into a single polyprotein of ~3000 amino acids long. It encodes helicase, protease and RNA-dependent RNA polymerase enzymes and four structural proteins (VP1–4). The non-enveloped capsid has an icosahedral T=pseudo3 symmetry and is around 30 nm in diameter. VP1, VP2 and VP3 form the outer portion, with VP4 located internally. Genomes are linear and non-segmented, around 8.8-9.7kb in length.

Life cycle Viral replication is cytoplasmic. Entry into the host cell is achieved by attachment to host receptors, which mediates endocytosis. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Translation takes place by ribosomal skipping. Insects serve as the natural host.

Pathogenicity Several viruses in this family are economically important because they are highly pathogenic to their honeybee and silkworm hosts, while others (including Dinocampus coccinellae paralysis virus, Nasonia vitripennis virus and Venturia canescens picorna-like virus) appear to cause little or no symptoms.

Taxonomy The family Iflaviridae contains one genus, Iflavirus, with the following 16 species, listed by scientific name and followed by the exemplar virus of the species:

References

External links ICTV Online (10th) Report; Iflaviridae ICTV Online (10th) Report; Iflaviridae, alternative link Archived 13 September 2017 at the Wayback Machine Viralzone: Iflavirus

Illustrations

Worked examples

Example 1 — a first encounter with Iflaviridae

Start with the simplest possible case. Write down what Iflaviridae claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Iflaviridae 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 Iflaviridae 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 Iflaviridae

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

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

Frequently asked questions

What is Iflaviridae in simple terms?

Why does Iflaviridae matter?

Because it connects several science 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 Iflaviridae?

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 Iflaviridae.