---
title: The microscopic world: viruses and vaccines — how Mova does on the tests · Biology
description: Lesson 258 of the biology course of Mova's primary school: 8 of 11 tests right, exam 1 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# The microscopic world: viruses and vaccines

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**Tests:** 8 of 11 right · **Exam:** 1 of 4 right · **Kind:** plain · **Understood:** 9 of 15 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 258 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/biology/258-the-microscopic-world-viruses-and-vaccines/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/).

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### Test 1 · right ✓ {#t1}

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«my mate says a virus is just a really tiny bacteria» What is right?

- **1.** No, a virus is much smaller and cannot copy itself without a cell — **← Mova's choice** · **✓ the right answer** · score 7
- **2.** Yes, they are exactly the same thing — no support
- **3.** Yes, it is just a baby bacterium that has not grown up yet, but will — no support
- **4.** No, a virus is a kind of tiny insect — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 7, the only option with support. Its support: lesson 258, line 7: «A virus gets into a cell and makes the cell build copies of the virus; it cannot copy itself on its own, so scientists argue whether viruses are alive.», reached through the option's own match among the sentences about the question's things. What matched: the same action «copy» (+4); the same doer «virus» (+2); the same thing acted on «virus» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t1/)

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### Test 2 · right ✓ {#t2}

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«ugh flu, 39 degrees, my body's broken» What is the fever really doing?

- **1.** Helping fight the virus by making it harder to multiply — **← Mova's choice** · **✓ the right answer** · score 3
- **2.** Showing the body has given up — no support
- **3.** Cooking the virus slowly in the blood until it is all dead — no support
- **4.** Nothing, fevers have no reason — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 258, line 11: «A fever is the body turning up the brain's thermostat to make it harder for germs to multiply; it is usually helpful, but a very high fever needs a doctor.», reached through the same lesson line as the sentence the question matched. What matched: the same action «make» (+3). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t2/)

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### Test 3 · wrong ✗ {#t3}

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«the doc gave me a jab, does that mean I've got the disease now» What is right?

- **1.** No, a jab is just water — **← Mova's choice** · no support
- **2.** No, the vaccine only shows the body a harmless piece or weak form of the germ — **✓ the right answer** · no support
- **3.** Yes, a vaccine always gives you the full illness for a while, so you get it over — no support
- **4.** Yes, but only for one week — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t3/)

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### Test 4 · right ✓ {#t4}

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Count them: a cartoon virus is drawn with 12 spikes. 5 of them stick to a cell. How many spikes are still free?

- **1.** 7 — **← Mova's choice** · **✓ the right answer** · no support
- **2.** 17 — no support
- **3.** 12 — no support
- **4.** 5 — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t4/)

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### Test 5 · right ✓ {#t5}

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In a cartoon, a virus is a green monster with arms that punches cells. What is true?

- **1.** Viruses are always green — no support
- **2.** A real virus has no arms or brain; it sticks to a cell and slips its instructions inside — **← Mova's choice** · **✓ the right answer** · score 3
- **3.** Viruses chase cells across the body like hungry animals and bite them with their teeth — score 1
- **4.** Real viruses really do have tiny fists — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 3, against 1 for the next best. Its support: lesson 258, line 17: «A computer virus is named after real viruses because it copies itself by getting into a host, a program instead of a cell.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «virus» (+2); the same circumstance (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t5/)

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### Test 6 · right ✓ {#t6}

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What would happen if almost everyone in a town was vaccinated against a disease?

- **1.** Nothing would change at all — no support
- **2.** The germ would grow stronger — no support
- **3.** The germ would find it very hard to spread — **← Mova's choice** · **✓ the right answer** · score 4
- **4.** Everyone would catch the disease at once — no support

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**Why:** It took the question to ask what happens next. It chose option 3 with score 4, the only option with support. Its support: lesson 258, line 9: «A vaccine shows the immune system a harmless piece or weak form of a germ, so the body learns to recognise it and fights it fast next time; when almost everyon…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «germ» (+3); the same action «find» (+2). Against it: a different thing acted on (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t6/)

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### Test 7 · right ✓ {#t7}

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«bats carry viruses so we should get rid of all of them» What is best?

- **1.** No, because bats will move into houses — score 4
- **2.** No, bats are vital for pollination and eating insects, and should be left alone — **← Mova's choice** · **✓ the right answer** · score 7
- **3.** Yes, bats are only pests that spread germs and do nothing useful at all for anyone — no support
- **4.** Yes, but only the big ones — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 7, against 4 for the next best. Its support: lesson 258, line 15: «Bats live in big crowded colonies and carry many viruses without getting sick, thanks to very strong immune systems; viruses can sometimes jump from animals to…», reached through the same lesson line as the sentence the question matched. What matched: the same action «eat» (+3); the same thing acted on «insects» (+3); the same doer «bats» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t7/)

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### Test 8 · wrong ✗ {#t8}

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Why is there no single vaccine that stops all colds?

- **1.** Colds are too small to vaccinate against — no support
- **2.** Vaccines only work on animals — no support
- **3.** Colds are not caused by germs — **← Mova's choice** · score 4
- **4.** There are over 200 different cold viruses — **✓ the right answer** · no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 3 with score 4, the only option with support. Its support: lesson 258, line 6: «Colds are caused by viruses spread by sneezes, coughs and touching hands and then faces, and there are over 200 kinds of cold virus, so you keep catching new o…», reached through the option's own match among the sentences about the question's things. What matched: the same action «cause» (+3); the same thing acted on «colds» (+3). Against it: a different doer (counts against) (-1); one says «not», the other does not (counts against) (-1). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t8/)

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### Test 9 · right ✓ {#t9}

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Granny had chickenpox as a girl and now has shingles. How can that be?

- **1.** The chickenpox virus hid in her nerves for decades and woke up — **← Mova's choice** · **✓ the right answer** · no support
- **2.** She caught it again from a baby in her family — no support
- **3.** Shingles comes from eating bad food that has gone off in the fridge — no support
- **4.** Shingles is a kind of sunburn — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t9/)

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### Test 10 · wrong ✗ {#t10}

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Can a virus ever help as a medicine?

- **1.** Yes, phages that attack bacteria are sometimes used when antibiotics fail — **✓ the right answer** · score 2
- **2.** No, viruses cannot touch bacteria — no support
- **3.** Yes, the cold virus cures headaches — no support
- **4.** No, every single virus is always harmful to every living thing on Earth — **← Mova's choice** · score 3

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 3, against 2 for the next best. Its support: lesson 63, line 10: «Soap breaks up the greasy layer that germs cling to and running water rinses them away; washing for about 20 seconds gives it time to work; cold viruses spread…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «cold viruses» (+2); the same circumstance (+1). The right option, 1, scored 2. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t10/)

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### Test 11 · right ✓ {#t11}

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In the 1630s a man paid as much as a house for one tulip bulb. What made his tulip special?

- **1.** Stripy petals caused by a virus — **← Mova's choice** · **✓ the right answer** · score 5
- **2.** It was made of real gold all the way through — no support
- **3.** It was the only tulip in the world — no support
- **4.** It could flower all year round, even in snow — no support

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**Why:** It took the question to ask who or what does it. It chose option 1 with score 5, the only option with support. Its support: lesson 258, line 16: «The famous stripes on «broken» tulips in old Dutch paintings were caused by a virus, and in the 1630s a single striped bulb could cost as much as a house.», reached through the same lesson line as the sentence the question matched. What matched: the same action «cause» (+6); the same circumstance (+2). Against it: a different thing acted on (counts against) (-3). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/t11/)

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### Exam question 1 · formal language · wrong ✗ {#e1}

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Identify the principal reason for which the status of viruses as living organisms remains a matter of scientific dispute.

- **1.** They are composed entirely of mineral matter, as crystals of salt are — **← Mova's choice** · no support
- **2.** They are incapable of growth or reproduction save within a living cell — **✓ the right answer** · no support
- **3.** They are larger than any bacterium — no support
- **4.** They persist for no longer than one second — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/e1/)

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### Exam question 2 · formal language · right ✓ {#e2}

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Select the response consistent with the established facts concerning the mode of action of a vaccine.

- **1.** It destroys every micro-organism within the body upon injection, both harmful and helpful alike, so that the body is clean — no support
- **2.** It presents to the immune system a harmless portion or weakened form of a pathogen, whereby recognition is acquired — **← Mova's choice** · **✓ the right answer** · score 4
- **3.** It induces the full disease in order that it may pass — no support
- **4.** It forms a protective coating upon the surface of each cell — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 4, the only option with support. Its support: lesson 258, line 9: «A vaccine shows the immune system a harmless piece or weak form of a germ, so the body learns to recognise it and fights it fast next time; when almost everyon…», reached through the option's own match among the sentences about the question's things. What matched: the same action «show» (+4); the same receiver «immune system» (+2). Against it: a different doer (counts against) (-2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Which of the following statements most accurately characterises the history of smallpox?

- **1.** It was eradicated by antibiotics in 1928, shortly after their discovery by Fleming in London — **← Mova's choice** · no support
- **2.** It remains the most common illness of the present day — no support
- **3.** Following the first vaccine of 1796, the disease was declared eradicated throughout the world in 1980 — **✓ the right answer** · no support
- **4.** It is identical with the common cold — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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Ascertain the origin of the variegated petals of the so-called «broken» tulips of the seventeenth century.

- **1.** The application of paint by florists — **← Mova's choice** · no support
- **2.** The crossing of tulips with garden roses — no support
- **3.** Cultivation in exceptionally cold soil — no support
- **4.** Infection of the plants by a virus — **✓ the right answer** · no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/258-the-microscopic-world-viruses-and-vaccines/e4/)

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- ← previous: [257. The microscopic world: bacteria, good and bad](https://md.mova.elamur.ai/free/en/school-run/biology/257-the-microscopic-world-bacteria-good-and-bad/)
- next →: [259. The microscopic world: tardigrades, mites, plank…](https://md.mova.elamur.ai/free/en/school-run/biology/259-the-microscopic-world-tardigrades-mites-plankton-and-other-tiny-creatures/)
- ↑ back to [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/)