Taylor conducted the experiments to provide semiconcervative mode of chromosome replication on

Options

A. Vinca rosea
B. vicia faba
C. Drosophila melanogaster
D. E. coli

Answer

To solve the question regarding Taylor's experiments that demonstrated the semiconservative mode of chromosome replication, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which organism Taylor used in his experiments to demonstrate the semiconservative mode of chromosome replication.

2. **Identifying the Organisms**: The options provided are:
- Vinca rosia
- Vicia faba
- Drosophila melanogaster
- E. coli

3. **Researching Taylor's Experiment**: Taylor conducted experiments using root tip cells of Vicia faba (broad bean). He treated these cells with radioactive thymidine to label the DNA.

4. **Labeling DNA**: The radioactive thymidine incorporated into the DNA allowed Taylor to track the replication process. This was crucial for demonstrating how DNA replicates semiconservatively.

5. **Growing in Normal Medium**: After labeling, the cells were grown in a normal medium without radioactive thymidine. This step was important to observe how the labeled DNA was distributed in the daughter cells after replication.

6. **Conclusion**: The results showed that during DNA replication, each new DNA molecule consists of one original strand and one newly synthesized strand, confirming the semiconservative model of replication.

7. **Final Answer**: Therefore, the correct answer to the question is Vicia faba.