Suppose you provided carbon dioxide with radioactive oxygen atoms to a plant. Into which kind of molecule would the radioactivity go?*

mutations occur in what molecule

you know why you need energy to function - without energy you feel tired and sluggish, and you have trouble concentrating. but why would a cell need energy? describe some cellular functions that require energy.

Radioactive decay produces ionising radiation.  Like all ionising radiation this can lead to harmful effects on living tissue due to cell damage including damage to DNA, mutation and cell death.  Contrast the differing health risks associated when working with alpha, beta or gamma radiation sources.