1. trans fat kina trans fat bhayo- cis-fat kina bhayena bhanne thaha pauna check your organic chemistry book. it should explain how the structures of molecules are changed due to addition of bonds and their implications will be there in organic book. structure change bhayeko le density pani change huncha... and those stuff...

2. feri, chemical reaction perspective herne ho bhane consult organic chemistry book. or, biochemistry book ma panim huna sakchha if it is general biochemistry book.

4 ko answer should link with the answer for 1.