Which neurons integrate information coming into and out of the central nervous system?
a. afferent neurons
b. motor neurons
c. interneurons
d. efferent neurons
e. sensory neurons
C
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The ubiquitin-proteasome pathway
_____ is used to regulate expression of a number of cell surface receptors. _____ requires only one molecule of ATP to target a protein. _____ targets proteins in a stepwise fashion via ubiquitin ligase adding ubiquitin residues to the protein. _____ is used to digest macromolecules. _____ does not destroy the ubiquitin moiety, but rather cleaves it off for reuse.
One difference between mitosis and meiosis is that mitosis ________.
A. produces cells genetically identical to the parent cell, but meiosis does not B. requires only one parent cell, but meiosis requires two parent cells C. produces haploid cells, but meiosis produces diploid cells D. produces more daughter cells for each division than meiosis
Suppose that the DNA of an organism is studied and found to contain 30% adenine. Based on this information, what percentage of thymine would you predict that the DNA of this organism would also contain?
a. 20% b. 30% c. 40% d. 50%
Some vertebrate animals have vertebrae that lack a centrum
a. true b. false