What plant secondary metabolite was isolated from the Cinchona tree to fight malaria?
A. taxol
B. penicillin
C. digitalis
D. acacia
E. quinine
Answer: E
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In the genus Caulobacter, asymmetric transverse fission produces a flagellated ________ cell that swims off but eventually settles, ejects its flagella, and forms a ________ that adheres to surfaces.
Fill in the blank(s) with the appropriate word(s).
Bile is crucial for ______ digestion because of its function in _______.
A. protein, protecting the stomach lining B. fat, solubilizing glycerol:fatty acid bonds C. nucleic acids, uncoiling DNA strands D. fat, emulsification E. protein, lyophilization
Adjacent animal cells utilize ____ to rapidly communicate with each other
a. gap junctions b. plasmodesmata c. hormones d. desmosomes e. neurotransmitters
Rats learning to press a lever to receive food is an example of
A. habituation. B. operant conditioning. C. classical conditioning. D. negative reinforcement. E. avoidance.