One way in which retroviruses differ from all other types of viruses is that retroviruses
A. possess an RNA genome.
B. possess only single-stranded nucleic acids.
C. can create a prophage.
D. have single-strained RNA that serves as viral mRNA.
E. have the enzyme reverse transcriptase.
E. have the enzyme reverse transcriptase.
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Liver cells help clean your blood with a wide range of digestive enzymes that hydrolyze toxic molecules. Which organelle in the cells would be responsible for removing these toxins from the blood?
A. vesicle B. lysosomes C. mitochondrion D. Golgi apparatus E. peroxisomes
A lake in which nutrients are low is
a. atrophic. b. oligotrophic. c. eutrophic. d. hypotrophic. e. hypertrophic.
When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.
Answer the following statement true (T) or false (F)
In mammalian defenses against invading pathogens, all of these are considered nonspecific defense mechanisms EXCEPT
A. the skin. B. antimicrobial proteins (e.g., interferon). C. the inflammatory response. D. acquired immunity. E. mucous membranes.