Which of the following statements is false?

Options

A. TMV has double-stranded RNA molecule
B. Most plant viruses are RNA viruses
C. The bacteriophage has a double-stranded DNA molecule
D. Most animal viruses are DNA viruses

Answer

To determine which statement is false, we will analyze each of the provided options regarding viruses and their genetic material.

### Step-by-Step Solution:

1. **Examine the First Option:**
- The statement claims that "TMV has a double-stranded RNA molecule."
- TMV stands for Tobacco Mosaic Virus, which is known to be a plant virus.
- The genetic material of TMV is actually single-stranded RNA (ssRNA), not double-stranded RNA (dsRNA).
- **Conclusion:** This statement is false.

2. **Examine the Second Option:**
- The statement claims that "most plant viruses are RNA viruses."
- It is well-established that the majority of plant viruses indeed contain RNA as their genetic material.
- For example, TMV is an RNA virus.
- **Conclusion:** This statement is true.

3. **Examine the Third Option:**
- The statement claims that "the bacteriophage has a double-stranded DNA molecule."
- Bacteriophages, which are viruses that infect bacteria, typically possess double-stranded DNA (dsDNA) as their genetic material.
- **Conclusion:** This statement is true.

4. **Examine the Fourth Option:**
- The statement claims that "most animal viruses are DNA viruses."
- While there are many DNA viruses that infect animals, it is important to note that a significant number of animal viruses are actually RNA viruses. Therefore, the statement may be misleading as it implies that DNA viruses are predominant.
- **Conclusion:** This statement is partially true but can be considered misleading.

5. **Final Conclusion:**
- The first option is definitively false, as TMV has single-stranded RNA, not double-stranded RNA.
- The second and third options are true, while the fourth option can be considered misleading but not outright false.

### Answer:
The false statement is: **"TMV has double-stranded RNA molecule."**