The purification and elucidation of the primary auxin's chemical structure were accomplished by:
a. Charles Darwin.
b. Francis Darwin.
c. Frits Went.
d. Kenneth Thimann.
e. F. Skoog.
D
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Thermostable proteins tend to have additional features that improve thermostability. Which of the following is NOT one of these features?
A) increased ionic interactions on the protein surfaces B) highly hydrophilic cores C) decreased tendency of the protein to unfold D) highly hydrophobic cores
. A simplified form of the Fick diffusion equation is J = DA (C1-C2) where J is the rate of diffusion, D is a constant, A is the area across which diffusion is occurring, and C1 and C2 are the concentrations of the substance on either side of the membrane. Given this, which of the following would INCREASE the rate of diffusion of a solute?
A. an increase in C1 while holding C2 constant B. an equivalent decrease in both C1 and C2 C. an equivalent increase in both C1 and C2 D. a decrease in D E. a decrease in A
A DNA molecule containing 32% thymine would contain how much cytosine?
A. 32% B. 36% C. 18% D. 64%
If an unrelated stimulus, such as the ringing of a bell, was presented at the same time as the meat powder, over repeated trials, a dog would salivate in response to the sound of the bell alone. This kind of response is called
A. operant conditioning. B. behavioral learning. C. deviant behavior. D. imprinting. E. classical conditioning.