A hydrogen bond is
a. a sharing of a pair of electrons between a
hydrogen and an oxygen nucleus.
b. a sharing of a pair of electrons between a
hydrogen nucleus and either an oxygen or a
nitrogen nucleus.
c. an attractive force that involves a hydrogen
atom and an oxygen or a nitrogen atom that
are either in two different molecules or
within the same molecule.
d. none of these.
e. all of these
C
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The organelle of plant cells that is analogous to the lysosome in animal cells is the
A) vacuole. B) triskelion. C) microsome. D) endosome. E) lysosome.
Why is high blood pressure damaging to the kidneys? What will be an ideal response?
Four of the five choices listed below describe
changes at the chromosomal level. Select the exception. a. base-pair substitution b. duplication c. translocation d. deletion e. inversion
Some dogs have erect ears; others have drooping ears. Some dogs bark when following scent; others
are silent. Erect ears and barking are due to dominant alleles located on different chromosomes. If two dihybrids are crossed, a. the most common phenotype is drooping ears and barking. b. all droopy-eared, silent dogs are pure-breeding. c. the least common phenotype is drooping ears and barking. d. there will be no phenotypes or genotypes that resemble the original parents. e. there will be no offspring that resemble the F1 generation.