8. All of the following have been found in or associated with ALL
retroviruses (endogenous. exogenous and human) EXCEPT:
A) viral RNA dependent DNA polymerase
B) oncogene
C) gag
D) env
E) integrase
9. All of the following genes are unique to human retroviruses
EXCEPT:
A) tat
B) nef
C) rev
D) vpu
E) pol
10. All of the following findings are consistent with the
identification of a virus as an endogenous retrovirus EXCEPT:
A) presence of an oncogene
B) presence of long terminal repeats (LTRs) on each end of the genome
C) presence of two copies of the genomic RNA within the nucleic acid core
D) presence of reverse transcriptase associated with the virion
E) identification of a DNA copy of the RNA genome integrated
within the host chromosome
8. Option B
Not all retroviruses have oncogenes. Retroviruses that cause tumor growth include Rous sarcoma virus and Mouse mammary tumor virus.
9.Option E
Pol gene is present in all retrovirus, it is not unique to human retroviruses
10. Option C
these viruses have resident DNA copies that abound in host chromosomal DNA
8. All of the following have been found in or associated with ALL retroviruses (endogenous. exogenous...
All EXCEPT which of the following are characteristics of retroviruses? All EXCEPT which of the following are characteristics of retroviruses? cause lysis of the host cell upon infection integration of the viral genome into the host genome genome composed of RNA synthesis of DNA from an RNA template by reverse transcriptase, a virally-encoded enzyme