Question

Following table summarises the differences between normal cells and cancerous cells. Pick up the wrong difference(s) and select the correct option.

	Normal cells	Cancerous cells
(i)	These cells undergo cell division as well as differentiation.	These cells undergo cell division but do not undergo differentiation.
(ii)	These cells show contact inhibition i.e., after coming in contact with other cells, these inhibit their uncontrolled growth.	These cells have lost the property of contact inhibition.
(iii)	Life span of these cells is not definite.	Life span of these cells is definite.
(iv)	These cells divide in controlled manner.	These cells divide in an uncontrolled manner.

• A. (i) and (iii)
• B. (iii) and (iv)
• C. (iii) only
• D. (ii) only

Answer 1

Answer: (C)

Life span of normal cells is definite while life span of cancerous cells is not definite.