In this era of science, research plays important role in every fileld of life.

Scientific research leads the nations towards success.

Either
"Scientific research leads the nation toward success" if one country, or

"Scientific research leads nations toward success" if more than one country

Towards / toward are somewhat interchangeable depending on region

Due to this research, many new things could happen in the world which weredid not exist and somewhere they werpreviously and some became essential for human kind.

I'm editorialising a little. I'm not sure what you meant by this sentence so I tried to make it sound like something I might say

Scientific research and development plays important roles in the modern society.

As for as rResearch is essential for every nation because it can to build new ideas together into new shape for new purposes.

As the prompt said, Government should place few restrictions into theon research areas.

In my opinion, Government should place more restrictions because scientific research is far more dangerous now a days.

Nowadays - I guess. This is something that is said out loud but not really written.

For instance, when students are working into labs and they are mixing different chemicals together.

This feels like half a sentence, I think it should join with the next sentence.

Most of the time, they accidently, theally mix-up the wrong chemicals which leads to destructionsamage / explosions / danger.

Destruction is more like - an entire city being destroyed, rather than a small event

For instance, the pandemic Covid-19 has already shown the fateful power of some viruses.

Don't need to specify pandemic

Therefore, there must be more restrictions on research and development to prevent forus from producing harmful results.

Moreover, without restrictions, some researchers may use dirty waytactics to simplify their research.

Dirty ways sounds strange

For example during the World War 2, Japanese scientists carried out numerous human body parttrials for their research as no one cared about their rights (the rights of the prisoners?).

I think this is what you mean?

In this era of science, research plays important role in every filedaspect of life.

You probably meant "field", which could work too.

Due to this research, many new things could happen in the world which weredid not exist and somewhere they were essential for human kind.

As for as rResearch is essential for every nation because it can to build new ideas together into new shapes for new purposes.

As the prompt said, Ggovernments should place few restrictions into the research areas.

or maybe "the government" ? You mention nations, so I assume it was plural.

In my opinion, Government should place more restrictions because scientific research is far more dangerous now a adays.

For instance, when students are working into labs and they are mixing different chemicals together.

or you could phrase it as "For instance, when students are working in labs and they are mixing different chemicals together, they can make dangerous products."

Most of the time, accidently, they mix-up wrong chemical which leads to destructions.

"destruction" makes sense here, but "disaster" might fit better.

For instance, the pandemic Covid-19Covid-19 pandemic has already shown the fateful power of some viruses.

Therefore, there must be more restrictions on research and development to prevent form producing harmful results.

or "...prevent [us/people/scientists] from producing..."

For example, during the World War 2, Japanese scientists carried out numerous human body parts for their research as no one cared about their rights.

Correct here. Just wanted to add that I think by "human body parts" you might mean "vivisections"?

These experiments carried out miserable state of prisonersmade prisoners miserable.

Uranium is such a harmful chemical because it is a radioactive element and it is usesd in chemical reactors for producing energy.

Such as For example, the researcher who have invented a nuclear reactor have cancelmight have revealed all the security risks within it .

I am not clear on the intended meaning.

In order to prevent researchers forom misconduct, there have been restrictiong s and supervisesion as well.

In conclusion, scientific research should not be conducted until there are enough restrictions and supervisions, because without them we cannot prevent researchers from producing deadly results.