1. | The nucleic scid core of phages is covered by a protein coat known as _______________ |
a. | capsomere |
b. | capsid |
c. | outer envelope |
d. | nuclear membrane |
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Answer: (b).capsid
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2. | The most complex type of bacterial virus has which of the following morphological features? |
a. | hexagonal head and tail fibres |
b. | no contractile sheath |
c. | hexagonal head but no tail |
d. | hexagonal head,rigid tail with contractile sheath |
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Answer: (d).hexagonal head,rigid tail with contractile sheath
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3. | Which of the following is true for the bacteriophage MV-L2 ? |
a. | head is made up of large capsomeres |
b. | head is made up of small capsomeres |
c. | no contractile sheath is present |
d. | filamentous form |
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Answer: (d).filamentous form
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4. | Pleomorphic viruses possess double-stranded DNA. |
a. | True |
b. | False |
c. | May be |
d. | Can't say |
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Answer: (a).True
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5. | What is the shape of helical phages? |
a. | regular solids |
b. | polyhedra |
c. | rod-shaped |
d. | icosahedral |
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Answer: (c).rod-shaped
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