Select the incorrect statement about DNA.

Options

A. DNA is acidic in nature due to presence of phosphate group.
B. DNA act as genetic material in majority of the organisms an it is structurally more stable as compared to RNA.
C. In bacteriophage `lambda`, 48502 base pairs are found in DNA.
D. F. Meischer first identified the DNA in 1829.

Answer

To solve the question regarding the incorrect statement about DNA, we will analyze each option provided in the question step by step.

### Step 1: Analyze Option 1
**Statement:** DNA is acidic in nature due to the presence of the phosphate group.

**Evaluation:** This statement is correct. DNA contains phosphate groups in its backbone, which contribute to its acidic nature. The phosphate groups are negatively charged, making DNA acidic.

### Step 2: Analyze Option 2
**Statement:** DNA acts as the genetic material in the majority of organisms and it is structurally more stable compared to RNA.

**Evaluation:** This statement is also correct. DNA is indeed the primary genetic material in most organisms, and it is more stable than RNA due to its double-helix structure and the presence of deoxyribose sugar, which is less reactive than ribose.

### Step 3: Analyze Option 3
**Statement:** In bacteriophage lambda, 48,502 base pairs are found in DNA.

**Evaluation:** This statement is correct. Bacteriophage lambda is known to have a genome consisting of approximately 48,502 base pairs.

### Step 4: Analyze Option 4
**Statement:** F. Miescher first identified DNA in 1829.

**Evaluation:** This statement is incorrect. Friedrich Miescher did isolate a substance he called "nuclein" from the nuclei of cells in 1869, not 1829, and he did not identify it as DNA in the context of it being the genetic material.

### Conclusion
After evaluating all the statements, the incorrect statement about DNA is **Option 4**.

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