NEB Class 12 • Biology • Applied Biology • Practice Set

Major Human Diseases Practice Set: NEB 12 Biology

Master Typhoid, Tuberculosis, HIV, Cholera, Influenza, Hepatitis and Candidiasis through clear concepts, representations, a reliable answer method and exam-focused practice.

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Concepts · Worked reasoning · NEB practice

Quick answer: Major human diseases differ in pathogen, transmission, target organs, incubation, prevention and treatment. Safe answers compare them systematically and use current public-health guidance rather than treating all infections alike.

Worked practice

Build the result from meaning, not memory

Major human diseases differ in pathogen, transmission, target organs, incubation, prevention and treatment. Safe answers compare them systematically and use current public-health guidance rather than treating all infections alike.

Worked example

Cholera prevention emphasizes safe water and sanitation, tuberculosis control requires testing and a complete multidrug regimen, and HIV is managed with antiretroviral therapy rather than antibiotics.

The governing relationship is Build a matrix of agent→route→key effects→prevention→diagnostic approach→treatment principle; vaccination and antimicrobial availability differ by disease. Check the convention, geometry or boundary condition before calculation.

Independent practice ladder

Define the key physical quantities and give their SI units.
Draw and label the relevant wave, ray, mode or energy diagram.
Recalculate the worked example after changing one input by a factor of two.
Explain the result without equations.
Create a Nepal-relevant situation such as a classroom speaker, musical pipe, optical slit or thermal machine.
Compare two cases and predict the larger output before calculating.
Find and repair one deliberately wrong sign, node or unit.
Write a three-mark answer and a five-mark answer.

Answer protocol: diagram → known data → principle → symbolic equation → SI substitution → result → physical check. Confusing virus, bacterium and fungus, recommending antibiotics for viral disease, presenting symptoms as diagnosis, or stigmatizing affected people.

NEB answer method

Model → evidence → equation → check

First identify the system and what the question asks. Label the diagram, apparatus or reaction with SI quantities, then state the principle before selecting an equation. Solve symbolically where possible and check units, limiting cases and chemical or physical meaning.

Stage	Question	Evidence
Model	What is idealised?	Assumption stated
Representation	Which diagram fits?	Labels or balanced equation
Calculation	Which relation follows?	Symbols then SI values
Evaluation	Does it make sense?	Unit, sign and trend check

Make the idea concrete in Nepal

Connect the model to a school laboratory, household technology, health, environment, energy or local material. The example should clarify the science rather than merely mention a place. Compare a prediction with an observation and record uncertainty.

Review the NEB Class 12 Biology revision roadmap and the complete Biology guide. For online or physical tuition, call 9846662070.

Questions students ask about Typhoid, Tuberculosis, HIV, Cholera, Influenza, Hepatitis and Candidiasis

What is the central idea of Typhoid, Tuberculosis, HIV, Cholera, Influenza, Hepatitis and Candidiasis?

Which equation should I remember?

Build a matrix of agent→route→key effects→prevention→diagnostic approach→treatment principle; vaccination and antimicrobial availability differ by disease.

How should I begin a numerical?

Draw the situation, list known quantities in SI units, choose the governing relation symbolically, substitute once and finish with a unit and reasonableness check.

What is a common exam mistake?

Confusing virus, bacterium and fungus, recommending antibiotics for viral disease, presenting symptoms as diagnosis, or stigmatizing affected people.

How can I practise this topic?

Alternate one concept explanation, one diagram and two numericals. Revisit errors after a day instead of only rereading the solution.

Where can I get tuition support?

For online or physical KTM Tuition classes, call 9846662070. After Grade 12, the MKS Education panel below gives preparation and pre-counselling contacts.

Frequently asked questions

References and next steps

Scope checked against CDC Nepal; concept support from an institutional reference and OpenStax Science. Continue with the Typhoid, Tuberculosis, HIV, Cholera, Influenza, Hepatitis and Candidiasis cluster.

NEB +2 tuition support

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