Which one of the following statements best describes the first thing researchers need to do to manipulate dna?
a. gel electrophoresis would be used to separate fragments of dna.
b. restriction enzymes would be used to cut the dna into smaller pieces.
c. single-stranded dna fragments would be placed with dna polymerase in a test tube.
d. researchers would need to separate synthesized strands by size on a gel."

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.