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In virus-infected plants the meristemati...

In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because

A

the dividing cells are virus resistant

B

meristems have anti viral compounds

C

the cell division of meristems are faster the rate of viral multiplication

D

viruses cannot multiply meristem cell (s).

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Context**: In virus-infected plants, the presence of the virus typically affects the entire plant. However, it has been observed that the meristematic tissues, which are responsible for growth in plants, remain free of the virus. 2. **Identifying Meristematic Tissues**: Meristematic tissues are regions in plants where cells are actively dividing. These include the apical meristem (located at the tips of roots and shoots) and axillary buds (located at the junction of the stem and leaves). 3. **Viral Multiplication**: Viruses replicate within host cells. In the case of plants, the viral replication occurs in the cells that are already infected. However, the rate of viral multiplication can vary. 4. **Cell Division Rate**: The key reason why meristematic tissues remain free of the virus is that the rate of cell division in these tissues is faster than the rate of viral multiplication. This means that by the time the virus attempts to replicate within the meristematic cells, those cells have already divided and formed new cells. 5. **Conclusion**: Therefore, the correct explanation for why meristematic tissues in virus-infected plants are free of the virus is that the cell division in these tissues occurs at a rate that outpaces the rate of viral multiplication. This allows new cells to form before the virus can replicate within them. ### Final Answer: The meristematic tissues in both apical and axillary buds are free of virus because the cell division of meristems is faster than the rate of viral multiplication.
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