A mutation in the gene encoding the enzyme that cuts F factor DNA during conjugation would result in
A. an inability to separate the recipient DNA from the donor DNA.
B. an inability to draw the conjugated cells close enough to allow DNA transfer.
C. the transfer of single-stranded DNA instead of double-stranded DNA.
D. the inability of the donor DNA to move through the pilus.
E. the inability of the recipient cell to replicate the F factor after transfer.
A. an inability to separate the recipient DNA from the donor DNA.
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The immune responses that result in the destruction of transplanted tissues are known collectively as
A. cytotoxic T-cell responses. B. antigen responses. C. secondary responses. D. rejection responses.
Mitotic cell divisions of the zygote are collectively called cleavage
Indicate whether the statement is true or false
A biome with complex structure, warm weather, plentiful rainfall, and diverse species is a
A. tropical rain forest. B. taiga. C. tundra. D. savanna.
A polar covalent bond results when:
A) one of the atoms sharing electrons is more electronegative than the other atom. B) two atoms share electrons equally. C) two atoms sharing electrons are equally electronegative. D) two atoms of the same element are sharing electrons.