Answer: alternative D.
Explanation: For the DNA to have the double strand structure, it is necessary to copy the sequence of the existing DNA strand in a complementary sequence of nucleotides, forming hydrogen bonds between them. The mRNA also uses this strategy when reading the DNA strand during the transcription, in order for the translation to begin.
Answer: Water, Sunlight, Carbon Dioxide, and oxygen
Explanation: Hope this helps
The exploitation of biological processes for industrial and other purposes especially the genetic manipulation of microorganisms for the production of antibiotics , hormones, ETC