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."

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Determine if the following statement is true or false. if true, choose true. if false, choose the rewording that is true. according to the law of independent assortment, alleles for each gene are inherited together so that they always stay together. according to the law of independent assortment, offspring express a combination of their parents' traits. according to the law of independent assortment, alleles for a characteristic split during meiosis and combine during fertilization. true according to the law of independent assortment, alleles for each gene are inherited independently so that no two alleles stay together.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation