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1
Locking genes in the off position involves
A)ionization.
B)hydration.
C)methylation.
D)phosphorylation.
2
Each adult stem cell is capable by itself of developing into a healthy individual and is therefore totipotent.
A)True
B)False
3
Wilmut's cloning success resulted from surgically combining __________________ and then applying an electrical shock to kick-start the cell cycle.
A)frog cells and sheep cells
B)cat cells and dog cells
C)mammary cells and sperm
D)egg cells and mammary cells
E)sperm and egg cells
4
Cloned stem cells are readily accepted by the body as they pass the immune system's ______________ identity check.
A)tissue
B)self
C)species
D)immune
5
Gene intervention of germ-line tissue
A)is only about 50% effective.
B)has proven to be very successful in humans.
C)requires the use of sexually transmitted viruses as vectors.
D)has not yet been attempted in humans.





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