Question

question 7 of 10
which of the following reactions is used to radioactively label dna?
a. degradation of dna
b. ligation of dna
c. restriction digestion of dna
d. synthesis of new dna

Explanation:

Radioactive labeling of DNA involves incorporating radioactive nucleotides (e.g., \(^{32}\)P - labeled phosphate groups) into new DNA strands during DNA synthesis. Degradation (A) breaks DNA down, ligation (B) joins DNA fragments, and restriction digestion (C) cuts DNA at specific sites. None of these directly involve adding radioactive labels to DNA like synthesis (D) does.

Answer:

D. Synthesis of new DNA