Question

One difference between a cancer cell and a normal cell is
A. Cancer cells cannot function properly because they suffer from contact inhibition.
B. Cancer cells continue to divide even when they are tightly packed.
C. Cell cycle of the cancer cell is arrested at the 5 phase.
D. Cancer cells are unable to synthesise DNA.

Answer 1

Hint: A cell is a membrane bound structure that acts as a functional unit of life.a cell is capable of carrying out all the life functions. Such as nutrition ,excretion, respiration, etc. Hence, a cell is called a functional unit of life.additionally the cell is the smallest unit of life and all the living beings are made up of cells. Hence, a cell is called the structural unit of life.

Complete answer: Cancer cell that sells the divide relentlessly, forming solid tumors or flooding the blood with abnormal cell division is a normal process used by the body for growth and repair.
Most definitive characteristic of Cancer cells is that they keep on dividing even when they are not required to divide and even when There is no space available for them.
The cancer cells are unable to stop cell division and they start to take up the nutrition of the material required for the functioning of the normal cells.
They keep on dividing and forming a tumor which is a group of cells formed in a restricted space where they cannot fit, taking up space for other cells and their nutrition.
They also cause the neighbouring cells to undergo mutation ( if the cancer is caused by mutation of the cells).
Cancer undergoes the cell cycle as any normal cell, but the difference is that they cannot stop after a specific number of cell cycles. They keep on dividing even when there is no space available..
Therefore, from above discussion we know that cancer cells continue to divide even when they are tightly packed. So, the correct answer is option B.
Cancer cells continue to divide even when they are tightly packed.

Note: Cell is the basic unit of life.Cell is capable of carrying out all the life functions that is only reason it is called as functional unit of life.Cancer cells are do sunset keep on dividing even ,they do not have enough space to divide and nor there is need to divide. Cancer cells undergo the cell cycle as a normal cell, but that they cannot stop after a specific number of cell cycles.