The recombinant virus assay (RVA) uses which type of amplification methodology?

a. Transcription-mediated amplification (TMA)
b. Nucleic acid sequence-based amplification (NASBA)
c. Strand displacement amplification (SDA)
d. Reverse transcription polymerase chain reaction (RT-PCR)


D
A phenotypic type of susceptibility testing for human immunodeficiency virus (HIV) is the RVA. This assay is used to test HIV-1 isolates to nucleoside analog reverse transcriptase (RT) inhibitors. RVA uses RT-PCR amplification of RT and protease (PR) gene coding sequences directly from the patient's plasma.

Biology & Microbiology

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In which one of the following ways does a proto-oncogene differ from an oncogene?

A) Proto-oncogenes code for proteins that regulate the expression of structural genes; oncogenes code for nucleic acids involved in cell division. B) Proto-oncogenes control normal cell division; oncogenes contribute to the development of cancer. C) When oncogenes become damaged, they become proto-oncogenes. D) Oncogenes activate tumor suppressor genes; proto-oncogenes repress tumor suppressor genes. E) Proto-oncogenes cause cells to self-destruct when damaged; oncogenes cause damaged cells to repair themselves.

Biology & Microbiology

Biological diversity is composed of what three levels?

A. genetic; species; and ecosystem diversity B. genetic; function; and process diversity C. ecosystem; species; and process diversity D. trophic; ecosystem; and species diversity

Biology & Microbiology

Organisms that are radially symmetrical have ________ embryonic germ layers

A) two B) three C) four D) five E) six

Biology & Microbiology

In which of the following kingdoms are mitochondria not present in organisms?

A. Protista B. Plantae C. Archaea D. Animalia E. Fungi

Biology & Microbiology