PCR lets researchers make millions of copies of a single genetic fragment, but it works faster on DNA in good condition: Each point of damage in the genetic
sequence slows the reaction down.
Not exact matches
If you think of a
reaction as a
sequence of many intermediate chemical rearrangements, the easy structural changes should happen quickly while more complicated rearrangements would be
slower, because there's a higher energy barrier to making those changes.
On neuropsychological tests such as letter -
sequence recognition on a computer, ADHD children have varied but frequently
slower reaction times.