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Viroids have

DS-DNA enclosed by protein coat
SS-DNA not enclosed by protein coat
SS-RNA not enclosed by protein coat
DS-RNA enclosed by protein coat
Additional Questions

Chromosomes in a bacterial cell can be 1 - 3 in number and

Answer

How does enveloped virus enter into host cells?

Answer

dsRNA is found in

Answer

Tailed bacteriophages are

Answer

Match the types of bacteria listed in column I with their activity given in column II. Choose the correct combination of alphabets of the two columns.

Column - I (Types of bacteria)Column - II (Activity)
A Streptomycesp Food poisoning
B Rhizobiumq Source of Antibiotics
C Nitrosomonasr Nitrogen fixation
D Acetobacters Nitrification
t Vinegar synthesis

Answer

Due to discovery of which of the following in 1980, the evolution was termed as RNA world

Answer

One important characteristic of viruses is that they

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Which type of DNA is found in bacteria?

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The non-living characteristic of viruses is

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Which of the following statements is not true for retroviruses?

Answer
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