Which of the following is (are) characteristic of some
amphibians?
a. gills
b. integumentary exchange
c. lungs for oxygen uptake
d. skin for carbon dioxide removal
e. all of these
Answer: e
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Protease inhibitors are useful in curing AIDS
Indicate whether this statement is TRUE or FALSE.
Aquaporins are ____
a. pores made of water molecules b. required for water to enter a cell c. found only in bacterial cells d. specific channels for water transport e. useful for cell signaling
The smooth endoplasmic reticulum functions in synthesis of
A) lipids. B) polysaccharides. C) proteins. D) DNA. E) lipids, polysaccharides, proteins, and DNA.
Pharmaceutical companies prefer to genetically engineer large animals with human genes because it may be possible to obtain large amounts of the resulting protein from the animals'
A) milk. B) fur. C) blood. D) meat. E) bones.