Exotoxins are
A. secretions that always target nervous tissue.
B. antiphagocytic factors.
C. lipopolysaccharides.
D. only released after a cell is damaged or lysed.
E. proteins.
Answer: E
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The form of RNA that cuts rRNA molecules is
A) tRNAs. B) pseudogenes. C) snoRNAs. D) microRNAs.
Describe the evolutionary relationship of lancelets to tunicates and to hagfishes. Are lancelets more closely related to tunicates or to hagfishes, or are they equally related?
What will be an ideal response?
One of the main problems associated with treating human diseases through gene therapy is
A) finding human cells that could potentially be genetically engineered. B) the inability to clone human cells. C) finding a delivery system that would target specific cell types. D) finding the correct form of the gene to be delivered. E) determining a disorder that could be cured through gene therapy.
Coronaviruses cause gastrointestinal disease
Indicate whether the statement is true or false