The opening to the protein itself in facilitated diffusion is ________
a. hydrophobic
b. hydrophobic only at the ends
c. hydrophilic
d. hypertonic
Ans: c. hydrophilic
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A(n) ____ would likely kill Methanococcus species
a. anoxic environment b. swamp c. intestine of a cow d. anaerobic environment
e. aerobic environmentMany scientists believe that the evolution of multigene families, such as the genes for hemoglobin, is a result of which type of genetic rearrangement?
A) Duplication B) Deletion C) Inversion D) Reciprocal translocation E) Nonreciprocal translocation
A cell in the G2 phase:a
has twice the amount of DNA present in a telophase nucleus.
b. has visibly distinct chromosomes. c. lacks a visible nuclear membrane. d. is in mitosis. e. is in cytokinesis.
Treponema pallidum can be transmitted
A. by contact with infected fomites. B. through sexual intercourse. C. from an infected mother to her unborn child. D. both by contact with infected fomites and through sexual intercourse. E. both through sexual intercourse and from an infected mother to her unborn child.