Bacteria protect themselves from viruses by fragmenting viral DNA with ____________?

Related Mcqs:

1. An enzyme which can convert single stranded RNA into double stranded viral DNA is called____________?

   A. DNAase
   B. RNAase
   C. DNA polymerase
   D. Reverse Transcriptase

2. DNA or RNA of viruses is enclosed in _______________ coat?

   A. Protein
   B. Carbohydrate
   C. Lipid
   D. DNA

3. Viruses are __________ smaller than bacteria?

   A. 10 – 100 times
   B. 10 – 1000 times
   C. 100 – 1000 times
   D. 1000 – 10000 times

4. Which of the following is not a viral disease?

   A. Cowpox
   B. Mumps
   C. Tetanus
   D. Small pox

5. Which of the following disease results in Paralysis due to viral attack on C.N.S:

   A. Measles
   B. Herpes simplex
   C. Hepatitis
   D. Polio

6. Viruses are considered living organisms because__________?

   A. They can be crystallized
   B. They occur in plants and animals
   C. They are microscopic
   D. They contain DNA and can be reproduced

7. Protein coasts of viruses are synthesized in____________?

   A. Lytic cycle
   B. Lysogenic cycle
   C. Both a & b
   D. All of these

8. Which of the statement about viruses is incorrect___________________?

   A. We can not grow them in laboratories on artificial medias
   B. They are obligate intracellular parasite.
   C. They can synthesize their nucleic acid
   D. They are resistant to most of antibiotic treatment

9. Non-enveloped naked viruses are known as___________?

   A. prions
   B. bacteriophages
   C. oncoviruses
   D. virions

   Submitted by: Maryam Aftab

10. Which of the following viruses has caused thousands of deaths globally as an ’emergent’ virus?

    A. MERS
    B. SARS-CoV-2
    C. OC43
    D. HKUt

    Submitted by: Eesha Khalid