Tracers are Elements That ____

Question

Tracers are elements that ____.  
A) are used in minute amounts in plants
B) can be monitored during biochemical reactions
C) must be inert
D) have an unbalanced electrical charge
E) must have a stable nucleus

Accepted Answer

Tracers are elements that can be monitored during biochemical reactions. They are often used to track the pathways of substances in biological systems. While tracers are often used in small amounts, they do not necessarily have to be inert or have an unbalanced electrical charge. Stability of the nucleus may be important for long-term studies, but it is not a defining characteristic of a tracer.