In ex vivo gene therapy, therapeutic DNA is injected into body cells with the use of a vector or carrier molecule.
Answer the following statement true (T) or false (F)
False
In in vivo gene therapy, therapeutic DNA is injected into body cells. In ex vivo gene therapy cells are removed from the individual and then are mixed with a normal gene that is contained in a vector.
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Bacteria
a. are diploid organisms. b. produce gametes. c. have a life cycle that varies between unicellular stage and multi-cellular stage. d. have a single circular chromosome. e. lack either DNA or RNA
Some archaea are extreme halophiles. This
means that they thrive in ___ conditions.
a. high temperature b. low temperature c. high sulfur d. high salt e. high oxygen
In one butterfly species, the colors of individuals range from white to black, with many shades of gray in between
If the butterflies in a mountain population become more and more similar in color over several generations (e.g., if most butterflies are the same shade of gray), what kind of evolutionary force is likely acting on the population? A) Artificial selection B) Stabilizing selection C) Directional selection D) Disruptive selection
Which of the following sulfur species is highly toxic?
a. hydrogen sulfide b. dimethylsulfide c. elemental sulfur d. calcium sulfate