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Diseases and Microbes – GK Quiz with Answers – Level 3

Hard questions on Pasteur, Jenner and Fleming, disease carriers like the Anopheles mosquito, plant pathogens, preservation with salt and sugar, and how antibiotics and vaccines protect the body.

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Questions, answer key and solutions.

Questions
50
Duration
35 min
Marks
50

Negative marking

Attempts
100
Access
Free
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Normal practice, or a Simulated test

Both use the same questions. Normal practice is untimed and needs no account: choose an option and the answer and solution appear at once. The Simulated test is the real computer-based format, with one 35-minute clock, a question palette and full screen, and your score, the key and the solutions arrive when you submit.

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How the two modes differ
No account needed

Normal

Untimed

Every question on one page, loading as you scroll. Choose an option and see straight away whether it was right.

  • No timer. Nothing to start and nothing to submit. Stop whenever you like.
  • Answered as you choose. Tap an option and it is marked at once, with the correct answer shown.
  • Solutions in place. The explanation, and the video where one has been added, sit under the question.
  • Open to guests. Normal practice needs no sign-in.
Real exam conditions

Simulated

Timed CBT

The computer-based test format: one clock, a question palette, and a score the moment you submit.

  • A clock that does not pause. 35 minutes from the moment you begin, and the paper is submitted for you when it reaches zero.
  • Question palette. Answered, not answered and marked for review, section by section, as the real interface has it.
  • Full screen, proctored. The test takes over the screen; leaving it three times submits the paper.
  • Answers hidden until you submit. The key, the explanations and your score all arrive together at the end.

About this test

Diseases and Microbes Level 3 GK Quiz: Pathogens, Vaccines and Antibiotics

This Level 3 GK quiz tests diseases and microbes: pathogens of humans, plants and animals, how infections spread, and how vaccines and antibiotics protect the body. It also covers useful microbes in curd, bread and nitrogen fixation, plus food preservation with salt and sugar. Aptitude360 provides a solution for every question.

Microbe and disease topics in this Level 3 set

  • Pioneers: Louis Pasteur, Edward Jenner and Alexander Fleming's discovery of penicillin
  • Plant and animal diseases such as citrus canker, wheat rust, yellow vein mosaic of bhindi, anthrax and foot and mouth disease
  • Carriers and spread: the female Anopheles mosquito, the housefly, droplets from sneezing and sexual contact
  • Viral infections including dengue, AIDS, influenza, chicken pox and Japanese encephalitis
  • Useful microbes: Lactobacillus in curd, yeast in dough, Rhizobium in root nodules
  • Preserving pickles with salt and jams and squashes with sugar

Key concepts on pathogens and prevention

  • Why antibiotics such as penicillin and streptomycin do not work against viruses
  • How a vaccine introduces dead or weakened microbes so the body makes antibodies
  • Acute, chronic and non-infectious diseases, with correct examples of each
  • Matching each disease to its microbe group: bacteria, virus, protozoa or fungi

Preparation tips for microbes and disease questions

  • Keep a table of disease, microbe group and carrier, split into human, plant and animal sections
  • Remember that yeast is a fungus, not a bacterium, as statements often swap this
  • Revise process sequences such as curd setting and dough rising in their correct order

Who should take this Level 3 set

General Awareness aspirants in the final stage of Biology revision who want harder matching, sequencing and statement questions on microorganisms.

FAQs about Diseases and Microbes – GK Quiz with Answers – Level 3

What are the microbial diseases in humans?
Common examples include typhoid and tuberculosis caused by bacteria, malaria caused by a protozoan, and dengue, influenza, chicken pox and AIDS caused by viruses.
Which diseases are caused by microbes in plants?
Citrus canker is caused by bacteria, rust of wheat by fungi, and yellow vein mosaic of bhindi by a virus.
Why do antibiotics not work on viral diseases?
Antibiotics act on bacteria, for example by stopping them from building their cell walls. Viruses reproduce only inside host cells and lack such structures, so antibiotics cannot stop them.
Who discovered penicillin?
Alexander Fleming discovered penicillin when he noticed that a mould stopped the growth of bacteria around it. Penicillin was later prepared from this mould as an antibiotic.

Test structure

How the paper is split, and how long each part runs. A section you have finished cannot be returned to.

SectionQuestionsTime
Diseases and Microbes GK Level 35035 min

Marking & rules

Total marks
50 across 50 questions.
Negative marking
A wrong answer costs marks. Leaving a question unanswered costs nothing.
Attempts
100 in total. An attempt is spent the moment you begin one.

What you get when you submit

The analysis is ready the moment you submit the paper.

Score and accuracy

Marks, percentage, right, wrong and skipped, and the time you took.

Section by section

The same figures for each section, so a weak one cannot hide in an average.

The full answer key

Every question with your answer, the right one, the working, and the video where there is one.

Where you stand

Your score against the spread of everyone else who has sat this test.

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