Q.
A $dsDNA$ found in E. coli has $N^{15}$ labeled nitrogen bases. This organism was provided with $N^{14}$ based nitrogen bases for the replication process. The two new DNA molecules are synthesised after one round of replication in the $N^{14}$ based medium. Which of the following optionscorrectly describes the comparison between parent DNA and daughter DNA
DNA
Density
Sequence of Nucleotides
Radioactivity
1
Parent DNA
Heavy
Same as daughter DNA
Not - radioactive
Daughter DNA
Hybrid
Same as parent DNA
Not - radioactive
2
Parent DNA
Heavy
Same as daughter DNA
Radioactive
Daughter DNA
Light
Same as parent DNA
Radioactive
3
Parent DNA
Light
Not the same as daughter DNA
Not - radioactive
Daughter DNA
Heavy
Not the same as parent DNA
Not - radioactive
4
Parent DNA
Light
Same as daughter DNA
Not - radioactive
Daughter DNA
Heavy
Same as parent DNA
Not - radioactive
| DNA | Density | Sequence of Nucleotides | Radioactivity | |
|---|---|---|---|---|
| 1 | Parent DNA | Heavy | Same as daughter DNA | Not - radioactive |
| Daughter DNA | Hybrid | Same as parent DNA | Not - radioactive | |
| 2 | Parent DNA | Heavy | Same as daughter DNA | Radioactive |
| Daughter DNA | Light | Same as parent DNA | Radioactive | |
| 3 | Parent DNA | Light | Not the same as daughter DNA | Not - radioactive |
| Daughter DNA | Heavy | Not the same as parent DNA | Not - radioactive | |
| 4 | Parent DNA | Light | Same as daughter DNA | Not - radioactive |
| Daughter DNA | Heavy | Same as parent DNA | Not - radioactive |
Molecular Basis of Inheritance
Solution: