UnScramble this Word: i i e s s n z?

Questions

What is the name of the fibrous protein present in the outer layer of the skin and in hair and nails?

What name was given to an Indian soldier in the service of the British?

Which English Leader's body was exhumed from Westminster Abbey and his dead body hanged at Tyburn?

In India and the East Indies, what is an elephant driver or keeper called?

What is the name of the tube connecting the middle ear with the pharynx?