What kind of covering does an angler fish have

Mutations in the active site induce a continue 'switch-on state' of the Ras proteins

Explanation:

Ras is a family of GDP/GTP-binding proteins expressed in all animal cells. Ras proteins play roles in signal transduction pathways, where they are activated to subsequently 'switched on'  other proteins involved in diverse cellular processes including cell growth, cell differentiation and survival. In consequence, the Ras genes are considered to be oncogenes because when they are overexpressed in cells their encoded proteins produce uncontrolled cell proliferation, thereby leading to cancer progression.