Aclass of proteins that eukaryotes use to turn genes on and off by allowing transcription to ouccur or blocking it are called ?

I think you're talking about histones. Histones are proteins found in eukayotic cell nuclei. Histones are what DNA wrap around so it fits inside the nucleus and helps with the formation of chromosomes.

True statement gravity force is more on bigger mass, less on smaller mass.all mass fall on planet with same acceleration and speeds