Viruses Reverse transcriptase is a useful enzyme to have when there are no host cells present spikes are forming in the new virus nutrients are scarce an RNA virus converts its RNA to DNA there are no host cells present spikes are forming in the new virus nutrients are scarce an RNA virus converts its RNA to DNA ANSWER DOWNLOAD EXAMIANS APP
Viruses Which of the following is not true of virions? Contain RNA Are extracellular Contain DNA Reproduce independently Contain RNA Are extracellular Contain DNA Reproduce independently ANSWER DOWNLOAD EXAMIANS APP
Viruses Viruses can be purified based on their size and density by using none of these precipitation differential centrifugation gradient centrifugation none of these precipitation differential centrifugation gradient centrifugation ANSWER DOWNLOAD EXAMIANS APP
Viruses The envelope of an enveloped virus is derived from none of these the endoplasmic reticulum of the cell the mitochondrion of the cell the cell membrane none of these the endoplasmic reticulum of the cell the mitochondrion of the cell the cell membrane ANSWER DOWNLOAD EXAMIANS APP
Viruses The temperate phage possesses a gene that codes for a repressor protein which makes the cell resistant to lysis initiated by lytic infection by other viruses Both (a) and (b) the prophage none of these lytic infection by other viruses Both (a) and (b) the prophage none of these ANSWER DOWNLOAD EXAMIANS APP
Viruses Which of the following statements is not true of viruses? All viruses are obligatory intracellular parasites Viruses probably arose from small fragments of cellular chromosomes All viruses have either DNA or RNA as their genetic material Viruses have been successfully grown in pure cultures in test tubes All viruses are obligatory intracellular parasites Viruses probably arose from small fragments of cellular chromosomes All viruses have either DNA or RNA as their genetic material Viruses have been successfully grown in pure cultures in test tubes ANSWER DOWNLOAD EXAMIANS APP
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