6. Suppose radioactive thymine was added to an actively dividing culture of E.coli bacteria. What would happen if a cell replicated once in the presence of this radioactive base?
A. one of the daughter cells, but not the other, would have radioactive DNA
B. neither of the two daughter cells would be radioactive
C. all four bases of the DNA would be radioactive
D. radioactive thymine would pair with nonradioactive guanine
E. DNA in both daughter cells would be radioactive
2007-02-10 06:48:07 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Biology
E. Semiconservative model, both daughter strands of DNA will be radioactive.
2007-02-10 06:53:32 · answer #1 · answered by kz 4 · 1⤊ 0⤋
a
bacterial replication is different from our replication.
when dna replicates one strand is kept the same and other takes in nucleotides from surrounding solution. semiconservative. so one cell would have regular dna the other would have radioactive thymine
2007-02-10 16:30:46 · answer #2 · answered by wesnaw1 5 · 0⤊ 0⤋