Which of the following is true of the leucine-zipper structural motif?
A. It contains several evenly spaced leucine residues that make specific DNA contacts.
B. It is made up of a single alpha-helix.
C. It is often used to mediate protein-protein interactions.
D. It is only found in bacterial proteins.
C
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Indicate whether the statement is true or false.
Weakening of trade winds results in
A) flooding in Peru. B) flooding in Indonesia. C) reduced convection. D) cooler ocean temperatures in Peru.
IgE antibodies are the rarest of the five types of immunoglobins and involved in an allergic response.
a. true b. false
Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival?
A) low temperature B) hypotonic C) isotonic D) hypertonic E) a biofilm