A hydrogen bond is a(n)
a. sharing of a pair of electrons between a
hydrogen and an oxygen nucleus.
b. sharing of a pair of electrons between a
hydrogen nucleus and either an oxygen or a
nitrogen nucleus.
c. attractive force between a hydrogen atom
and either an oxygen or a nitrogen atom
that are in other molecules or within the
same molecule.
d. covalent bond between two hydrogen
atoms.
e. covalent bond between a hydrogen atom
and either an oxygen atom or a nitrogen
atom.
C
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What products would be expected to form during anoxic degradation of the seven-carbon compound benzoate following reduction and cleavage of the aromatic ring?
A) 1 three-carbon compound and 1 four-carbon compound B) 1 three-carbon compound and 2 two-carbon compounds C) 2 three-carbon compounds and CO2 D) 3 two-carbon compounds and CO2
Accelerated evolution has occurred in all of the following types of human genes except those for:
A. chemosensory perception. B. immune function. C. reproduction. D. transcription factors. E. brain development or size.
Plump coccobacilli that tend to resist alcohol decolorization and may be mistaken for Neisseria spp. are:
a. Bordetella spp. b. S. maltophilia. c. Acinetobacter spp. d. P. oryzihabitans.
After processing of pre-mRNAs, the regions that are retained in finished mRNAs are called ____
a. UTRs b. snRNPs c. exons d. domains e. introns