It was the structure of DNA. Watson and Crick stole the credit from a woman whose name I can't remember, but basically she took really long exposure photographs (24 hours for some) and saw an X shape, which was the corresponding sign of a double helix. It was a pretty complicated method she was using and nobody had thought of using it for DNA research until then.
Answer:
TGGCAATCG
Explanation:
Remember:
Adenine always pairs up with either Uracil (RNA) or Thymine (DNA)
Cytosine always pairs up with Guanine (Both DNA and RNA)
Since biochemical function is determined largely by specific enzymes (proteins), different sets of genes must be turned on and off in the various cell types. This is how cells differentiate.
Hi I do not know I'm not in that grade
