Question Detail
Question
The Delta agent, a defective virus, is unique because it relies on the presence of which specific helper virus for its expression?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The document states, 'Satellite viruses are defective viruses for which no intact version exists; they rely on helper viruses for replication. An example is the Delta agent, which is expressed only in the presence of the hepatitis B virus.'
Hint
This is a specific example mentioned for defective/satellite viruses.