How do steroid hormones differ from those derived from amino acids?
a. steroid hormones are not derived from organic molecules
b. steroid hormones do not bind to plasma membrane receptors
c. steroid hormones use a second messenger system
d. steroid hormones do not travel in the blood
e. steroid hormones do not require receptors to function
ANSWER: b
You might also like to view...
The onset of a given epidemic is indicated by a sharp rise in the number of cases reported daily over a brief interval. This indicates that the mode of transmission is
A) host to host. B) a common source. C) insect vector. D) mechanical vector.
In a study of the raw materials used for photosynthesis, what two kinds of molecules would be studied?
a. carbon dioxide and glucose b. carbon dioxide and oxygen c. carbon dioxide and water d. glucose and water e. glucose and oxygen
Phloem transport of sucrose is often described as going from source to sink. Which of the following would not normally function as a sink?
A) growing leaf B) growing root C) storage organ in summer D) mature leaf E) shoot tip
Sulfanilamide is an antimicrobial drug that mimics the shape of an important substrate for a particular bacterial enzyme, thereby inhibiting the enzyme. This type of inhibition is known as
A. allosteric inhibition. B. competitive inhibition. C. allosteric activation. D. noncompetitive inhibition. E. feedback inhibition.