Discussion
Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that
Answer: B
Correct answer: both chromatids of a chromosome were labeled
After one round of replication in labelled thymine, every DNA molecule has one old (unlabelled) and one new (labelled) strand - so both sister chromatids carry label. That is exactly what semi-conservative replication predicts; a conservative mechanism would have left one chromatid entirely unlabelled. The asymmetry appears only in the second round.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development