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Bihar Board Class 12 (Science) Biology in Human Welfare & Health — practice questions — page 3

Explore 90 free Biology in Human Welfare & Health questions in Bihar Board Class 12 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biology in Human Welfare & Health questions and exercises with answers

Showing questions 61–90 of 90.

Personal or public measure?Read the answer and worked solution →True or false: immunity and diseaseRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Polio is caused by:Read the answer and worked solution →The vector that transmits MALARIA is:Read the answer and worked solution →According to WHO, health is best defined as:Read the answer and worked solution →Antibodies are produced byRead the answer and worked solution →Anabaena and Nostoc are examples of:Read the answer and worked solution →Bacteria that produce methane in a biogas plant are called:Read the answer and worked solution →Baculoviruses are used as biological control agents against:Read the answer and worked solution →The first antibiotic to be discovered was:Read the answer and worked solution →Municipal waste water is also called:Read the answer and worked solution →The gas produced by microbes from dung and used as fuel is:Read the answer and worked solution →Lactic acid bacteria coagulate milk protein by producing:Read the answer and worked solution →BOD stands for biochemical oxygen:Read the answer and worked solution →A common methane producing bacterium is:Read the answer and worked solution →Root nodules of legumes are formed by symbiosis with:Read the answer and worked solution →The fungus developed as a biological control for plant disease is:Read the answer and worked solution →Sewage is treated until its BOD is:Read the answer and worked solution →Cyanobacteria such as Anabaena serve as biofertilisers in:Read the answer and worked solution →Complete the definition of healthRead the answer and worked solution →Penicillin was named after which mould?Read the answer and worked solution →Vaccination provides protection against future infection mainly byRead the answer and worked solution →Which of these is a common opioid drug of abuse?Read the answer and worked solution →Cervical cancer is most commonly caused byRead the answer and worked solution →HIV primarily infectsRead the answer and worked solution →Milk is converted into curd by which micro-organism?Read the answer and worked solution →The puffed up appearance of dough is caused by:Read the answer and worked solution →

Worked practice questions

Personal or public measure?

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Items
  1. Item
    Personal cleanliness
    Category
    Personal
  2. Item
    Individual hygiene
    Category
    Personal
  3. Item
    Proper waste disposal
    Category
    Public
  4. Item
    Decontaminating drinking water
    Category
    Public
  5. Item
    Vector control
    Category
    Public
  6. Item
    Immunisation programmes
    Category
    Public
Categories
  1. Item
    Personal
  2. Item
    Public
Both matter, but they act at different scales. Source: syllabus Biology, Human Health and Disease.

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True or false: immunity and disease

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Questions
  1. Statement is true
    Yes
    Statement
    The immune system helps prevent disease after exposure.
  2. Statement is true
    Yes
    Statement
    The skin is one of the body's innate defences.
  3. Statement is true
    Yes
    Statement
    Immunisation is listed as a preventive measure.
  4. Statement is true
    No
    Statement
    Only medicines, never the body itself, prevent disease.
  5. Statement is true
    Yes
    Statement
    Untreated falciparum malaria may prove fatal.
The immune system is the body's own defence. Source: syllabus Biology, Human Health and Disease.

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Assertion and reason

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Questions
  1. Reason
    It removes the breeding sites of the mosquito vector.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Draining stagnant water reduces malaria.
  2. Reason
    It is defined as complete physical, mental and social well-being.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Health cannot be measured by illness alone.
  3. Reason
    Personal cleanliness helps prevent disease.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    Personal hygiene alone is sufficient for public health.
The reason must genuinely explain the assertion. Source: syllabus Biology, Human Health and Disease.

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