Question

"Mass can neither be created nor destroyed"

Then explain how do cells divided. How we get the atoms to make new cells.

Explain in 200+ words!!!

Answer 1

LAW OF CONSERVATION OF MASS:
Law of conservation of mass states that mass can neither be created nor be destroyed, by a chemical reaction or some physical changes.              -                ~Antoine Laurent Lavoisier
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Now to your question,where do cells get atoms to make new cells?

Well, Did u have your breakfast today?
What did it contain?  Matter? and matter have mass isn't it?

So what our body does is take in the food u eat, digest it, By digestion we just mean rearranging of atoms. To form carbohydrates,proteins,vitamins.etc etc.....which is exactly what we need for the formation of new cell.

What actually happens is one single cell is loaded with all these essential components (mass increases) and once it is enough to make new cell, The cell divides to forms new cells (increased mass is distributed among the divided cells).    ~Mass is conserved

So the extra atoms we get to make new cells, is through the food we eat.

This process takes place through a process called cell cycle.


And one most important thing,

The law of conservation of mass is applicable for some in-complex chemical reactions and most of the physical reaction, Law of conservation of mass is not universal.

According to Einstein's famous Mass-energy equivalence law, Mass can be converted to energy (which happens at nuclear reactor)

    E = mc²

Answer 2

Lavoisier sir gave Law of conservation of mass , that matter is neither created nor destroyed . means total mass of system neither be created nor be destroyed .

now in case of cell division !!!
first of all we understand how cell divide and form new cell .

★ actually cell replication don't engage in nucleosynthesis or fusion or fission or radioactive decay . this is just normal biomolecules arrangement of molecules . cell don't destroyed the matter or make the matter .
for understand read this step of metosis .
( metosis is a process by which we show how cells are replicating ) .

(1) fist of all cells create a copy of its entire DNA sequence .
(2) then two copies of the DNA are separated and pulls into opposite ends of the cell where they will start forming new cell nuclie .
(3) and finally cell splite into two daughter cells .

Here we saw , how the cell divide and form new cells but actually we know that cell division possible only when they take in the required amount of material and energy from the food we eat and air we breathe and then cell build new cell.
it means some mass destroyed by cells for its development and cell division .

now again read Lavoisier law : -
He said not mass neither created nor destroyed , he said total mass neither created nor destroyed .
here cell division and formation of new cell total mass conserved . this is other matter some mass destroyed by cell for deployment or in any required work .
but total mass of cell neither created nor be destroyed .