Which of the following is a method used by animal viruses to gain entry into host cells?

• A. Budding from the host cell
• B. Binary fission
• C. Endocytosis
• D. Direct fusion with the plasma membrane

Answer: (C)

Verified step by step guidance

1. Understand that animal viruses must enter host cells to replicate, and they use specific mechanisms to do so.
2. Recognize that 'budding from the host cell' is a process viruses use to exit the cell, not to enter it.
3. Know that 'binary fission' is a method of asexual reproduction used by bacteria, not a viral entry mechanism.
4. Learn that 'endocytosis' is a process where the host cell membrane engulfs the virus, allowing it to enter the cell enclosed in a vesicle.
5. Understand that 'direct fusion with the plasma membrane' is another method some enveloped viruses use to enter the host cell by merging their envelope with the cell membrane.