LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why don’t cells just stretch when you grow, instead of making copies of themselves?
A
The muscles in the cells can’t stretch that far.
B
The cell won’t be able to bring in food fast enough or get waste out fast enough.
C
The cell membrane doesn’t like the feeling of stretching.
D
The lysosomes don’t want to work so hard.
Explanation: 

Detailed explanation-1: -So if a cell grows larger instead of dividing, diffusion will be too slow and the cell will not be able to obtain nutrients and get rid of wastes efficiently, which ultimately would kill the cell. Thus, cells divide so that an organism can get bigger, despite the fact that cell size is limited.

Detailed explanation-2: -The rate of diffusion decreases with increase in cell size making the cell less efficient. Therefore, instead of increasing in size, with growth, the cells reproduce to grow larger in number and maintain their efficiency.

Detailed explanation-3: -When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.

There is 1 question to complete.