What proteins are encoded by the retroviral pol gene? What is unique about the translation of this gene from the polycistronic RNA?
What will be an ideal response?
Ans: The pol gene codes for a protease that cleaves the polyproteins coded by the retroviral genes into individual proteins, a reverse transcriptase that can generate a DNA copy of the viral RNA, and an integrase that facilitates the insertion of viral DNA into the host genome. The translation of pol requires the ribosome to bypass an in-frame termination codon after translating the gag gene.
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What is the proper sequence in the flow of air in
mammals? a. nasal cavities, larynx, pharynx, bronchi, trachea b. nasal cavities, pharynx, bronchi, larynx, trachea c. nasal cavities, pharynx, larynx, trachea, bronchi d. nasal cavities, larynx, pharynx, trachea, bronchi e. nasal cavities, bronchi, larynx, trachea, pharynx
The hosts for the causative agent of cholera between
El Niño Southern Oscillations are a. humans. b. algae. c. copepods. d. shellfish. e. marine worms.
What does the process of differential centrifugation achieve?
a. It analyzes the chemical components of the cell. b. It allows researchers to view the contents of the cells. c. It separates components of the cell that have different densities. d. It separates different components of the cell that function differently. e. It separates components of the cell that have a different chemical makeup
The only single-celled organisms are prokaryotes, such as archaea and bacteria.
a. False because some eukaryotes, including protista, are single-celled. b. False because some prokaryotes are multicellular. c. True because prokaryotes are the simplest cell form. d. False because all single-celled organisms are prokaryotes. e. True because all eukaryotes are multicellular.