Pheromones
a. are social signals.
b. are detected by the vomeronasal organ in
reptiles and most mammals.
c. may serve as sex attractants.
d. are not detected or responded to by humans.
e. include all EXCEPT "are not detected or
responded to by humans.
E
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_______________ are chemical substances produced in small quantities in one part of an organism and then transported to another part of the organism, where they bring about physiological responses.
A. Glycoproteins B. Photosynthates C. Hormones D. Heat shock proteins E. Pulvini
How many beta sheets are present in crambin?
a. 1 b. 2 c. 3 d. 4
The half life of Carbon 14 is approximately
____ years.
a. 16,000,000 b. 60,000 c. 8,200 d. 5,400 e. 500
Some kinds of drain cleaners use enzymes rather than strong, more dangerous chemicals. These enzymes must be able to
a. catalyze a catabolic reaction. b. raise the energy of the reaction that clears the clog. c. create energy that can be used to break up the clog. d. catalyze an anabolic reaction.