Baltimore Classification System

Question 1

Class I

Answer 1

dsDNA (+-) virus

classical semi conservative

Question 2

Class II

Answer 2

ssDNA (+) virus

Classical semi-conservative, discard (-) strand

Question 3

Class III

Answer 3

dsRNA (+-) virus
make ssRNA (+) and transcribe from this to give ssRNA (-) partner

Question 4

Class IV

Answer 4

ssRNA(+) virus
make ssRNA(-) and transcribe from this to give ssRNA (+) genome

Question 5

Class V

Answer 5

ssRNA(-) virus
make ssRNA(+) and transcrbe from this to give ssRNA (-) genome

Question 6

Class VI

Answer 6

ssRNA(+) retrovirus 
make ssRNA (+) genome by transcription of (-) strand of dsDNA

Question 7

Class VII

Answer 7

dsDNA (+-) virus

transcription followed by reverse transcription