<prompt> Which of the following is associated with aging ?Reduced cross linkages in collagenIncreased free radical injuryDecreased Somatic mutations in DNAIncreased superoxide dismutase levels  <response>: Ans. is b i.e., Increased free radical injuryFree radical reactive oxygen species mediated damage is one of the impoant factor that contribute to cellular aging. The rate at which antioxidant system catalase, peroxidas and superoxide dismutase is synthesized declines with cell aging.About other optionsCross linkages in collagen increases with cell aging.Somatic mutations increase with cell aging. 