Best radiolabelled marker for DNA replication is: (A) Ribose, (B) Thymidine, (C) Phosphate, (D) Uracil
Answer is B. Nucleic acids are readily labeled with tags that facilitate detection or purification. A variety of enzymatic or chemical methods are available to generate nucleic acids labeled with radioactive phosphates, fluorophores, or nucleotides modified with biotin or digoxygenin for example.