Indicate whether each of the following features of gene regulation exists only in prokaryotes, only in eukaryotes, or in both.Nucleosome b.Operator...

8 Indicate whether each of the following features of gene regulation exists only in prokaryotes, only in eukaryotes, or in both.    

a.    Nucleosome  

b.    Operator   

c.    Trans-acting regulatory proteins 

d.    Sigma-factors that recognize promoter sequence 

e.    Histone modification 

f.     Promoter 

g.    TATA-binding protein 

h.    Distance-independent cis-acting regulatory sequence 

i.     Alternative splicing 

j.     siRNA