Most components of energy conversion systems evolved very early; thus, the most fundamental
aspects of energy metabolism tend to be:
a. quite different among a diverse group of organisms.
b. very different among plants and animals.
c. the same among the autotrophs but different among heterotrophs.
d. the same among prokaryotes but different among eukaryotes.
e. very similar in a wide range of different organisms.
E
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The building blocks of nucleic acids are
a. amino acids. b. fatty acids. c. monosaccharides. d. nucleotides. e. lipids.
HeLa cells proved particularly useful to biologists because they ________
a. divide continuously in contrast to the limited number of divisions seen with typical cells b. differentiate into virtually any cell type when stimulated with the proper hormone c. are multinucleated d. are among the largest cells known
Which of the following is supported by the fossil record?
a. How the anatomy of organisms has changed over time b. How homologous structures and vestigial structures differ c. How organisms in similar environments have similar features d. How geological changes have impacted evolutionary development
Given the structure of the anti-HIV drug azidothymidine (AZT), how do you think it blocks viral replication?
a. It blocks RNA synthesis b. It inhibits host T cells from replicating c. It inhibits the assembly of new viruses in the cell d. It blocks DNA synthesis e. It prevents HIV from entering the cell