Proteins that have more than one polypeptide arranged together have a ________ structure.
A. primary
B. secondary
C. tertiary
D. quaternary
Answer: D
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A single mRNA molecule can be read by more than one ribosome simultaneously
Indicate whether this statement is true or false.
Which group of urinary drugs is also used for treatment of glaucoma?
a. loop diuretics b. ACE inhibitors c. carbonic anhydrase inhibitors d. cholinergic agonists
In general, polar molecules diffuse more rapidly through the lipid bilayer part of cell membranes than do nonpolar molecules. This statement is:
A. true. B. false, because polar molecules diffuse through less rapidly because the bilayer is polar throughout its width. C. false, because polar molecules diffuse through less rapidly because the bilayer is nonpolar throughout its width. D. false, because nonpolar molecules diffuse through more rapidly because much of the bilayer is nonpolar. E. false, because the rate of diffusion of nonpolar and polar molecules through the bilayer is essentially the same as long as the molecules are the same size.
Which of the following muscles has its origin on the hyoid and inserts on the tongue?
A) hyoglossus B) lateral pterygoid C) sternohyoid D) thyrohyoid E) geniohyoid