If a drug binds to a receptor, which normally triggers the opening of a Na+ channel, causing it to open in the absence
of neurotransmitter release, what is the most likely result?
a. an increased number of IPSPs
b. an increased number of EPSPs
c. a prolonged hyperpolarization
d. a decreased number of IPSPs
e. a decreased number of EPSPs
ANSWER: b
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Which is/are a function(s) of the cytoplasmic membrane in prokaryotes?
A) It functions as a permeability barrier. B) It is an anchor for many proteins involved in bioenergetic reactions and transport. C) It is a major site of energy conservation. D) It serves as a permeability barrier, a docking station for proteins involved in bioenergetics reactions and transport, and a site for energy conservation.
Reproduction always involves which of the following?
a. creation of a minimum four cells per round of cell division b. creation of genetically identical cells c. the use of DNA as a basis for cellular reproduction d. the use of RNA as a basis for cellular reproduction
The sequence of nucleotides in DNA specifies the sequence of ________ in a protein.
Fill in the blank(s) with the appropriate word(s).
A chimpanzee's closest extant relative is a(n)
A. mandrill. B. human. C. South American spider monkey. D. orangutan.