INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

Which of the following statement(s) is/are correct?

1. The B-lymphocytes in human body produce an army of proteins in response to pathogens into our blood to fight with them. 

2. The T-lymphocytes mediate cell-mediated immunity (CMI) which is responsible for the graft (transplanted body-part) rejection. 

Select the correct answer using the code given below.

Explanation:

ANSWER: (C) 

  • The immune system is a complex network of cells known as immune cells that include lymphocytes. Lymphocytes are white blood cells and one of the body's main types of immune cells.
  • The B-lymphocytes produce an army of proteins in response to pathogens into our blood to fight with them. These proteins are called antibodies. (Thus, Statement 1 is correct)
  • The T-cells themselves do not secrete antibodies but help B cells to produce them. Because these antibodies are found in the blood, the response is also called as humoral immune response. This is one of the two types of our acquired immune response – antibody mediated. The second type is called cell-mediated immune response or cell-mediated immunity (CMI). 
  • The T-lymphocytes mediate CMI. The cell-mediated immune response is responsible for the graft (transplanted body-part) rejection. (Thus, Statement 2 is correct)

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