A) autotomy
B) cell lysis
C) apoptosis
D) None of these
Correct Answer: C
Solution :
Programmed Senescence Theory states that ageing is a result of switching on of certain genes and switching off other genes. B and T-lymphocytes which have the receptors for self-antigens, undergo programmed cell death or apoptosis. This process eliminates about 90% of all the B-lymphocytes produced in bone marrow. Autotomy is the breaking off a part of the body by the organism itself. Cell lysis refers to the lysis or bursting of a cell by the destruction of the cell membrane.
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