The answer is d because i had the same problem yesterday in biology
With only one exception (the hyoid<span> bone in the throat), every bone in the human body meets up with at least one other bone at junctions called joints.</span>
DNA has sequences that mRNA finds the pair for (ex. DNA says AGC, RNA says UCG)
with that, they only come in 3 nucleotide increments.
It would be the mitosis of the body cells
Hope this helps :)
