11.  Viroids were discovered by .....

A. Diener

B. Woese

C. Pasteur

D. Iyengar

Answer : Option A

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12.  Viroid consists of..........

A. DNA

B. RNA

C. Protein

D. none of above

Answer : Option B

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13.  Which of the following diseases is caused by viroid ?

A. Polio

B. Diphtheria

C. Alzheimers

D. Typhoid

Answer : Option C

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14.  The name virus was given by ________ .

A. Ivanowsky

B. Pasteur

C. Diener

D. Hershey

Answer : Option B

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15.  Virus have ....

A. DNA core, Lipid coat

B. DNA or RNA core, Protein coat

C. DNA or RNA core, plasma membrane

D. DNA containing nucleus, lipid envelope

Answer : Option B

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16.  A virus contains ________ .

A. DNA

B. RNA

C. DNA or RNA

D. DNA and RNA

Answer : Option C

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17.  TMV virus was discovered by ________ .

A. Pasteur

B. S. L. Miller

C. Ivanowsky

D. W. M. Stanley

Answer : Option C

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18.  The main structural component of virus is ________ .

A. nucleic acid

B. Protein

C. nucleic acid and protein

D. nucleic acid or protein

Answer : Option C

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19.  The first existing group of plant is ________ .

A. Fungi

B. Alage

C. Lichens

D. Pteridophytes

Answer : Option B

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20.  

Match the following :

A                                                B

(p) Chlamydomonas          (i)Colonial Forms

(q) Volvox                          (ii)Unicellular

(r) Ulothrix                         (iii)Filamentous forms

(s) Nostoc                         (iv)Cyanophyceae

A. p - (i), q - (ii), r - (iii), s-(iv)

B. p - (ii), q - (iii), r - (i), s-(iv)

C. p - (iii), q - (i), r - (iv), s-(ii)

D. p - (ii), q - (i), r - (iii), s-(iv)

Answer : Option D

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