<prompt> All are labile cells exceptBone marrow cellsHepatocyteEpidermal cellsLiving cells of small intestine  <response>: Chemokines are a family of small proteins that act primarily as chemoattractants for specific types of Leukocytes.They are classified into four major groups according to the arrangement of the conserved cysteine cResidues in mature proteinso When a cell proliferates, it passes through a cell cycle.o Cell cycle has a series of phases : - G1 phase Rest phase Presynthetic phase S phase Synthetic phase in which the synthesis of DNA takes place. G2 phase Resting phase Postsynthetic or postmitotic phase. M phase Mitotic phase in which mitosis takes place. 