Q. Consider the following statements:
1.Viruses that cannot transmit effectively are less of a concern for public health.
2.The primary mode of Zika virus transmission is through the bodily fluids such as saliva and semen.
3.Extracellular vesicles are small, fat-enclosed structures that transport substances within and outside cells.
Which of the statements given above are correct?
Answer: C
Notes:
Explanation –
Statements 1 and 3 are correct. Viruses that cannot transmit effectively pose a lower threat to public health as they can’t easily spread and infect large populations. Extracellular vesicles are small, fat-enclosed structures that transport substances within and outside cells. These vesicles are rich in PS proteins and are found in high concentrations in saliva and semen, but not in blood. They compete with viruses for the PS receptors, effectively blocking the viruses from infecting cells.
Statement 2 is incorrect. The primary mode of Zika virus transmission is not through bodily fluids like saliva and semen. While Zika can be present in these fluids, it’s spread mainly by mosquito bites.
Source: The Hindu
