There is no DNA in

Options

A. An enucleated ovum
B. Mature RBCs
C. A mature spermatozoan
D. Hair root

Answer

**Step-by-Step Solution:**

1. **Understanding DNA**: DNA, or deoxyribonucleic acid, is the genetic material found in living organisms. It is primarily located in the nucleus of eukaryotic cells and also exists in mitochondria.

2. **Analyzing the Options**:
- **Option 1: Enucleated Ovum**: An enucleated ovum is an egg cell that lacks a nucleus. However, it still contains mitochondria, which have their own DNA. Therefore, this option cannot be correct.
- **Option 2: Mature RBCs (Red Blood Cells)**: Mature red blood cells in mammals do not have a nucleus or mitochondria. Since both of these organelles are absent, mature RBCs do not contain any DNA. This option is a strong candidate for the correct answer.
- **Option 3: Mature Spermatozoon**: A mature sperm cell has a nucleus and mitochondria, both of which contain DNA. Thus, this option cannot be correct.
- **Option 4: Hair Root**: The hair root contains living cells, which have a nucleus and therefore contain DNA. This option is also not correct.

3. **Conclusion**: After analyzing all the options, the only one that does not contain DNA is the mature red blood cells (RBCs). Therefore, the correct answer is **Option 2: Mature RBCs**.

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