Nucleic acid having 5-methyl uracil is genetic material in

Options

A. HIV
B. QB bacteriophage
C. TMV
D. `T_(4)` Phage.

Answer

To solve the question "Nucleic acid having 5-methyl uracil is genetic material in", we need to follow these steps:

### Step 1: Understand the Components
- Recognize that 5-methyl uracil is another name for thymine.
- Thymine is a nitrogenous base that is found in DNA but not in RNA.

### Step 2: Identify the Genetic Material
- Since the question refers to a nucleic acid that contains 5-methyl uracil (thymine), we are specifically looking for a type of genetic material that is DNA.

### Step 3: Analyze the Options
- The question likely provides several options that include different viruses or organisms.
- We need to identify which of these options is known to have DNA as its genetic material.

### Step 4: Evaluate Each Option
- **HIV**: This virus has RNA as its genetic material, so it is not the correct answer.
- **QB Bacteriophage**: This bacteriophage has RNA as its genetic material, thus it is also not the correct answer.
- **T4 Bacteriophage**: This bacteriophage is known to have double-stranded DNA, which contains thymine (5-methyl uracil).
- **Tobacco Mosaic Virus**: This is a plant virus that contains RNA, so it is not the correct answer.

### Step 5: Conclusion
- After evaluating the options, the correct answer is the **T4 Bacteriophage**, as it is a virus that has DNA as its genetic material, which includes thymine.

### Final Answer
The nucleic acid having 5-methyl uracil (thymine) as genetic material is found in the **T4 Bacteriophage**.

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