Which hormone is obtained from herring sperm DNA ?

Options

A. Cytokinin
B. Auxin
C. Giberlline
D. Ethylene

Answer

To solve the question "Which hormone is obtained from herring sperm DNA?", we will analyze the options provided and identify the correct answer step by step.

### Step 1: Understand the Options
The options given are:
1. Cytokinin
2. Auxin
3. Zebulin
4. Ethylene

### Step 2: Identify the Source of the Hormone
We need to determine which of these hormones is specifically obtained from herring sperm DNA. The question indicates that we are looking for a hormone that is isolated from this particular source.

### Step 3: Recall Relevant Information
From biological studies, we know that:
- **Cytokinins** are a class of plant hormones that promote cell division. Kinetin, a type of cytokinin, was isolated from herring sperm DNA.
- **Auxins** are involved in stem elongation and apical dominance but are not derived from herring sperm DNA.
- **Zebulin** is associated with germination and elongation but is not linked to herring sperm DNA.
- **Ethylene** is a gaseous hormone responsible for fruit ripening and is not derived from herring sperm DNA.

### Step 4: Conclusion
Based on the information above, the hormone isolated from herring sperm DNA is **Cytokinin**.

### Final Answer
The correct answer is **Cytokinin**.

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