[" 21.Fraticater actit an tirted to facire onflote: "],[[" (a) "f(x)=sin x+cos x," (b) "f(x)=sin x-cos x],[" (c) "f(x)=sin x*cos x]]

A : Tertiary structure of protein is absoulutely necessary for many biological actitives of proteins. R : In protein, only right handed helices are observed.

A : Tertiary structure of protein is absoulutely necessary for many biological actitives of proteins. R : In protein, only right handed helices are observed.