Crossword Clue:

SUBNUCLEUS a secondary nucleus

Answer	Crossword Clue
RNA	Part of a nucleus
PROTON	Part of a nucleus
ATOMICSTRUCTURE	It includes a nucleus

ATOM	Bit with a nucleus
NETKNOT	Part of a cell nucleus
RNA	Part of a cell nucleus
CADRE	Nucleus of a military group.
HARDCORE	Unyielding nucleus of a group
DNA	Material in a cell's nucleus