Which of the following types of chemical linkages is the weakest?
a. polar covalent bonds
b. van der Waals forces
c. ionic bonds
d. hydrogen bonds
e. nonpolar covalent bonds
B
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The designation of magnesium ion as Mg2+ indicates:
A. an atom that has lost two electrons and is negatively charged. B. an atom that has two more neutrons than protons. C. an atom that has lost two electrons and is positively charged. D. an atom that has gained two protons and is positively charged. E. an atom that has gained two protons and is negatively charged.
Fuels such as gasoline are nonpolar and have high potential energy because they are largely composed of
A. sulfates. B. hydrocarbons. C. carboxylic acids. D. amines. E. alcohols.
In the Hershey and Chase experiment, 32P was used to label ____ and 35S was used to label ____
a. RNA; protein b. protein; DNA c. phospholipids; protein d. protein; phospholipids e. DNA; protein
Which grouping includes all of the protists?
A. Kingdom Plantae B. Domain Eukarya C. Kingdom Animalia D. Domain Archaea