The slight positive charge of a hydrogen atom in one water molecule is drawn to the slight negative charge of an oxygen atom in another. This interaction is known as a(n) __________.
A. oxygen bond
B. water bond
C. hydrogen bond
D. covalent polarity bond
E. magnetic bond
Answer: C
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DNA renaturation (hybridization) can be used to (select all that apply):
A. determine whether a DNA strand from one species is complementary to a DNA strand from another species. B. cleave long fragments of DNA into smaller fragments for analysis. C. amplify small samples of DNA by replicating them. D. identify the sequence of a DNA strand. E. none of these.
Bacterial cultures with a large number of genetically identical cells are called:
a. clone cultures. b. equal cultures. c. simple cultures. d. identical cultures. e. fresh cultures.
When do the centromeres divide in meiosis?
A. prophase II B. anaphase II C. telophase I D. anaphase I E. prophase I
Pentamidine is an example of an antimicrobial
A) used to treat bacterial infections. B) effective against helminths. C) used to treat viral infections. D) effective against eukaryotes, especially protozoa. E) used to treat both bacterial and fungal infections.