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21.  Which of the following is viral disease:
A. Polio B. Mumps
C. Rabies D. All of these

22.  Which one of the following is not a viral disease?
A. Polio B. Common cold
C. Chickenpox D. Typhoid

23.  Nucleic acids form:
A. 6% of virus B. 100% of virus
C. 50% of virus D. 25% of virus

24.  Protein molecules forming capsid in a virus are called:
A. Capsomeres B. Macromeres
C. Chromomeres D. None of these

25.  A collar-like structure between head and tail as well as an end plate is present in:
A. Bacteria B. Bacteriophage viruses
C. All viruses other than bacteriophages D. None of these

26.  Which of the following will survive if boiled in a test tube at 100?C:
A. Bacteria B. Viruses
C. Both (a) and (b) D. None of these

27.  What will happen if capsid of a virus is removed:
A. Will it die B. Will it germinate
C. Will it remain normal D. Will it change in nature

28.  Which of the following is an interesting feature of viruses:
A. That they occur only inside the bacteria B. That they behave as plants
C. That they multiply only inside the cytoplasm of host cell D. That they are made up of proteins only

29.  A bacteriophage consists of:
A. Only proteins B. Carbon and nitrogen
C. DNA D. Nucleoproteins

30.  Which of the following charcters justifies the living nature of viruses:
A. They are only nucleoproteins but without histones B. They can be crystallized and stored for many years
C. Nucleic acids in them can induce protein synthesis to form capsid D. All of these




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