If you wanted to radioactively tag newly synthesized DNA, the numbered phosphate would need to be radioactive is 3.
It should be noted that DNA, or deoxyribonucleic acid, means the hereditary material that is found in humans. Nearly every cell in a person's body has the same DNA.
In this case, deoxyribonucleic acid is composed of two polynucleotide chains which coil around each other to form a double helix that are important for carrying genetic instructions for the development, growth and reproduction of organisms.
In this case, if you wanted to radioactively tag newly synthesized DNA, the numbered phosphate would need to be radioactive is 3. DNA is made of chemical building blocks that are called nucleotides.
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