Question

Vaccines are preparations containing heat killed or chemically weakened pathogens or their surface coatings which function as ‘X’.

Choose the correct statement about ‘X’.

• A.
  These are immunoglobulins which are produced by specific WBCs.
• B. These are any foreign substances which stimulate the production of antibodies when introduced into the body.
• C.
  These are the chemicals which alter the genetic structure of pathogens in order to stop their harmful effects.
• D.
  These are the chemicals which block the bacterial synthesis pathway without affecting our own.

Answer 1

The correct option is B These are any foreign substances which stimulate the production of antibodies when introduced into the body.

Vaccines are preparations containing heat killed or chemically weakened pathogens or their surface coatings that function as any foreign substances which stimulate the production of antibodies when introduced into the body. Immunoglobulins (antibodies) are generated in our body when any vaccine is administered.