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ICSE Class 9 Health and Hygiene — practice questions

Explore 28 free Health and Hygiene questions in ICSE Class 9 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Health and Hygiene questions and exercises with answers

Showing questions 1–28 of 28.

The capacity of a pathogen to cause disease in a host is known as its:Read the answer and worked solution →The severity or harmfulness of the disease produced by a pathogen is its:Read the answer and worked solution →Which bacterium is the primary causative agent of human tuberculosis?Read the answer and worked solution →The fungal pathogen Candida albicans is the most common cause of:Read the answer and worked solution →Infectious misfolded proteins that propagate without nucleic acids are:Read the answer and worked solution →Smallest infectious plant pathogens consisting solely of circular RNA are:Read the answer and worked solution →Which human retrovirus is the causative agent of HIV/AIDS?Read the answer and worked solution →Malaria and amoebiasis are human diseases caused by pathogenic:Read the answer and worked solution →Generalized infections caused by parasitic worms (helminths) are termed:Read the answer and worked solution →A biological carrier that transmits infectious pathogens between hosts is a:Read the answer and worked solution →Respiratory infection transmitted through coughing droplets is called:Read the answer and worked solution →Transmission of disease directly from mother to fetus during childbirth is:Read the answer and worked solution →Transmission of infection caused by an inanimate reservoir is termed:Read the answer and worked solution →An infection where symptoms develop rapidly over a short duration is an:Read the answer and worked solution →Which type of infection develops slowly and persists over months or years?Read the answer and worked solution →An infection that is dormant and produces no active symptoms is termed a:Read the answer and worked solution →Pathogens that cause disease in otherwise normal, healthy hosts are called:Read the answer and worked solution →What visible mound of bacterial growth forms on a solid culture agar plate?Read the answer and worked solution →Preventive measures that reduce the incidence and spread of germs are:Read the answer and worked solution →Which hygiene practice is most effective to curb pathogen transmission?Read the answer and worked solution →When coughing or sneezing, respiratory hygiene recommends covering using:Read the answer and worked solution →Targeted hygiene in home settings aims fundamentally to:Read the answer and worked solution →Substances applied to cuts and wounds on the skin to prevent sepsis are:Read the answer and worked solution →Chemical products manufactured specifically to kill pathogens are called:Read the answer and worked solution →Match each bacterial disease with its primary clinical symptom:Read the answer and worked solution →Match each viral infection with its route of transmission:Read the answer and worked solution →Match each immunological category with its medical definition:Read the answer and worked solution →Match each widespread vaccine with the diseases it prevents:Read the answer and worked solution →

Worked practice questions

The capacity of a pathogen to cause disease in a host is known as its:

  1. Commensalism
  2. Pathogenicity
  3. Susceptibility
  4. Competence
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Correct answer: B. Pathogenicity

Pathogenicity defines the ability of a microbial agent to infect a host and produce disease.

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The severity or harmfulness of the disease produced by a pathogen is its:

  1. Immunity
  2. Virulence
  3. Infectivity
  4. Tolerance
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Correct answer: B. Virulence

Virulence reflects the degree of pathology or damage inflicted by a pathogenic organism upon its host.

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Which bacterium is the primary causative agent of human tuberculosis?

  1. Streptococcus
  2. Mycobacterium
  3. Staphylococcus
  4. Salmonella
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Correct answer: B. Mycobacterium

Tuberculosis is an infectious respiratory illness primarily caused by Mycobacterium tuberculosis.

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