Most doctors believe that probiotics, such as Bifidobacterium,
a. have great therapeutic potential.
b. are a good alternative to fecal transplants.
c. have limited therapeutic potential.
d. should be taken at the same time as antibiotics.
Answer: C
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Because of hydrogen bonding, water is uniquely suited for its central role in life. Many hydrophilic molecules interact freely with water, but there are a number of hydrophobic molecules important for life, too
How does the interaction between water and hydrophobic molecules help to organize biological systems? A. Because cells are not pure water (they have many substances dissolved within them), the hydrophilic/hydrophobic effect has little role in biological organization. B. The ionic bonds between water cause hydrophobic molecules to associate with one another and not with water molecules. C. Because water molecules preferentially associate with one another, they force hydrophobic molecules to associate with one another and not with water molecules. D. None of the above
In reabsorption
a. plasma proteins are returned to the blood. b. excess hydrogen ions are removed from the blood. c. excess water is passed on to the urine. d. nutrients and ions are selectively returned to the blood. e. drugs and foreign substances are passed into the urine.
Most lipids need to be attached to transport proteins to move through blood
Indicate whether the statement is true or false
Material is engulfed directly by the cell by
A. diffusion. B. osmosis. C. phagocytosis. D. active transport.