MIC281_BALTIMORE CLASSIFICATION

Which of the following is NOT the criteria used in Baltimore classification?

• DNA or RNA

• Negative or positive sense

• Helical or icosahedral

• single- or double-stranded

Which of the following is correct about the POSITIVE SENSE RNA virus?

• it requires RNA polymerase to transcribe RNA before translation

• it has the same sequence as mRNA

• it has the sequence complementary to the mRNA

• it cannot be translated immediately by the host cell

A negative sense strand is a nucleic acid strand that has the sequence complementary to the mRNA

• True

• False

when these viruses infect cells, the genome can function as mRNA and immediately translated by the host cell. Which class this statement is referring to?

• (+) ssRNA virus

• (-) ssRNA virus

• dsDNA virus

• ssDNA virus

what is the other name for reverse transcriptase?

• RNA-dependent RNA polymerase

• DNA-dependent DNA polymerase

• RNA dependent DNA polymerase

• DNA dependent RNA polymerase

The viral genome can either have the same base sequence as the mRNA (plus-strand DNA) or be complementary to the mRNA (minus-strand DNA). Which class this virus belongs to?

• Class I

• Class II

• Class III

• CLass IV

what is the name of enzyme for DNA --> DNA?

• DNA-dependent RNA polymerase

• RNA-dependent DNA polymerase

• DNA-dependent DNA polymerase

• RNA-dependent RNA polymerase

what is the name of the enzyme for RNA --> RNA?

• DNA-dependent RNA polymerase

• RNA-dependent RNA polymerase

• DNA-dependent DNA polymerase

• RNA dependent DNA polymerase

Which of the class virus retrovirus belongs to?

• Class III

• Class IV

• Class V

• Class VI

The reverse transcriptase also possesses ribonuclease

activity, which is used to degrade the RNA strand of the RNA-DNA hybrid. This statement is referring to which class virus?

• Class I

• Class III

• Class IV

• Class VI