16. Which of the following oncogenic viruses was first detected?

A. Rous sarcoma virus.
B. Epstein-Barr virus
C. Herpes simplex virus type 2
D. Human T cell leukaemia virus

17. The yield of phage per bacterium is called the

A. eclipse size
B. latent size
C. burst size
D. none of these

18. Which of the following viruses are relatively thermostable?

A. Human immunodeficiency virus
B. Rubella virus
C. Hepatitis A virus
D. Influenza virus

19. The time from infection until lysis is called as

A. eclipse period
B. rise period
C. latent period
D. burst size

20. Virus reproduces in living cells by

A. replication
B. duplication
C. multiplication
D. all of these