What did Richard Axel and Linda Buck discover about the way in which we are able to perceive many different types of odors?
A. Many different types of odors bind to just a few different types of receptor molecules.
B. Vertebrate animals make a large number of distinct types of receptor proteins, each of which binds a particular odorant molecule or small group of such molecules.
C. Odors are distinguished by the way in which they bind both olfactory and taste receptors—it is the overall "picture" generated this way that we perceive.
D. None of these choices are correct.
B. Vertebrate animals make a large number of distinct types of receptor proteins, each of which binds a particular odorant molecule or small group of such molecules.
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The virus repressor protein provides immunity to infection by the same type of virus
Indicate whether the statement is true or false.
Metagenomics may be useful because
A) it could be used to detect or predict human diseases. B) it will allow for the sequencing of entire bacterial species genomes. C) metagenomes do not change rapidly. D) metagenomes are not responsive to environmental changes.
In invertebrates with open circulatory systems, hemolymph is composed of:
A. interstitial fluid. B. plasma plus interstitial fluid. C. plasma plus intracellular fluid. D. plasma.
CCK is a gut peptide thought to be a(n) _________ peptide,
Fill in the blank(s) with the appropriate word(s).