Answer: The DNA double helix is held together by two types of bonds,
covalent and hydrogen.
Explanation: Covalent bonds occur within each linear strand and strongly
bonds the bases, sugar and phosphate groups.
I would say C if thats not right then its problable D
I think two are stem cell research and cloning
Answer: for cutting DNA sequences
Answer:
Th order of the nucleotide bases in the organisms DNA.
