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SAI International School
                                                   Subject- Biology
                                            Chapter- Why do we fall ill?
                                        Subtopic- Principles of Treatment
                                                       Module-22
                                                 Home Assignment II

                                                     WORKSHEET-1
                Q1.  Which substance is/are produced within an organism to prevent the spread of
                       microorganism?
                       A) Antiseptics
                       B) Antibiotics
                       C) Antibodies
                       D) All of these
                Q2.  Select the incorrect statement.
                       (a) Vaccines  are  preparations  of  antigenic  proteins  which  generate
                          permanent passive immunity against all pathogens.
                       (b) First vaccine was formed by Edward Jenner.
                       (c) DPT is a vaccine that provides immunity for three different diseases.
                       (d) Tetanus is caused by a rod shaped bacterium.
                Q3.  Introducing dead or weakened germs in the body of living being for
                       developing immunity for a specific disease is called:
                       (a) Pathogenicity
                       (b) Immunization
                       (c) Antibiotic
                       (d) Antigen - antibody complex
                       DIRECTION : Question nos. 4 and 5 below consist of two statements -
                       Assertion (A) and Reason (R). Answer these questions selecting the
                       appropriate option given below:
                       a)  Both A and R are true and R is the correct explanation of A.
                       b)  Both A and R are true but R is not the correct explanation of A.
                       c)  A is true but R is false.
                       d)  A is false but R is true.
                       e)  Both Assertion and Reason are false.
                Q4.  Assertion:Polio is known to cause paralysis and crippling in large number of
                       children every year.
                       Reason:  Government has started a Polio Eradication Programme.
                Q5.  Assertion: Haemophilia is a congenital disease.
                       Reason:  Haemophilia  is  caused  by  a  gene  mutation  during  one's  own
                       life span.
                Q6.  Name any three diseases transmitted through vectors.
                Q7.  Why is AIDS considered to be a ‘Syndrome’ and not a disease?
                Q8.  Becoming  exposed  to  or  infected  with  an  infectious  microbe  does  not
                       necessarily mean developing a noticeable disease. Explain.
                Q9.  Discuss the causes, symptoms, preventive measures and treatment of AIDS.
               Q10.  What is immunity? Explain natural and acquired immunity.
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