Mutations in which of the following gene(s) lead to hyperhomocysteinemia?

What rule can be amended if a life safety hazard to a victim that can be saved without undue risk to firefighters is present on scene?

A. SAR rule B. SCBA rule C. Two-in, two-out rule D. Situational awareness rule

When free radicals previously produced by the interaction of radiation with water molecules act on a molecule such as DNA, the damaging action of ionizing radiation is indirect in the sense that the radiation is not the immediate cause of injury to the macromolecule. What is the immediate cause of this damage?

a. Excitation of the atoms of the biologic macromolecules b. Enzymes released from biologic macromolecules c. The recombining of a positively charged water molecule with an electron d. The free radicals produced by the interaction of radiation with water molecules