Carbonic anhydrase (CA), an enzyme widely present in plant and animal tissues, catalyzes the reaction: 
This reaction is important for the maintenance of acid base balance in blood and other tissues and to help transport CO2 out of tissues; without a catalyst, this reaction would not occur at rates that could maintain homeostasis. In the figure below, which line(s) represents the reaction catalyzed by carbonic anhydrase?
A. Line B; the activation energy has been lowered
B. Line A; more energy is supplied
C. Lines A and B; product is shown for both lines
D. Line A; the activation energy increased
E. Either, as the free energy is the same for both
Answer: A
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a. always genetically modified organisms b. always made using DNA technologies c. only used in basic research d. only used in applied research e. created through natural mutations or by using DNA technologies
Which of the following hormones promotes fruit ripening and dropping of leaves?
A) auxin
B) ethylene
C) gibberellin
D) abscisic acid
The domain ____ contains plants, fungi, protists, and animals- all of which are eukaryotes.
Fill in the blank(s) with the appropriate word(s).
Is the resting membrane potential of a neuron closer to the equilibrium potential for K+ or Na+?
A. Na+ B. K+ C. It is an average of the two.