Cytokinins are considered a part of

Options

A. t-RNA
B. r-RNA
C. DNA
D. Vascular tissues

Answer

**Step-by-Step Solution:**

1. **Understanding Cytokinins**: Cytokinins are a class of plant hormones that play a crucial role in promoting cell division and growth in plants. They are essential for various plant developmental processes.

2. **Identifying the Options**: The question provides four options: tRNA, rRNA, DNA, and vascular tissue. We need to determine which of these is related to cytokinins.

3. **Analyzing tRNA**: Transfer RNA (tRNA) is responsible for bringing amino acids to the ribosome during protein synthesis. Interestingly, cytokinins can be derived from tRNA. Specifically, recycled tRNA can produce cytokinins through a degradation process.

4. **Understanding the Role of tRNA in Cytokinin Production**: During the degradation of tRNA that carries uridine with a pre-nylated adenosine, cytokinins are released. This indicates a direct relationship between tRNA and the production of cytokinins.

5. **Evaluating Other Options**:
- **rRNA** (ribosomal RNA) is involved in protein synthesis but does not directly relate to cytokinins.
- **DNA** is the genetic material and does not directly produce cytokinins.
- **Vascular tissue** is involved in the transport of nutrients and water in plants but is not directly related to the production of cytokinins.

6. **Conclusion**: Based on the analysis, cytokinins are considered a part of tRNA, as they are produced from the degradation of recycled tRNA.

**Final Answer**: Cytokinins are considered a part of **tRNA**.

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