In the Chemistry of Aging,a Free Radical Is a

Multiple Choice

In the chemistry of aging,a free radical is a

A) naturally occurring,highly reactive chemical that forms in the presence of oxygen.
B) type of protein fiber that makes up the body's connective tissue.
C) type of mutation that leads to genetic defects in offspring.
D) form of DNA that is found at the ends of chromosomes,serving as a protective cap.