Prior to the S phase of the cell cycle, a cell passes through a regulatory checkpoint. If
mutations are detected in the cell, the __________ will initiate cell death.
a. tumor suppressor genes
b. oncogenes
c. DNA repair genes
d. metastatic cells
A
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As a result of fermentation, cells produce ____
a. ADP b. NADH c. FAD d. O2 e. NAD+
Hydrogen bonds are the result of attraction between:
a. the H of one water molecule and the H of another water molecule. b. the two H atoms of the same water molecule. c. the H and O of the same water molecule. d. the H of one water molecule and the O of another water molecule.
The accompanying illustration shows the F2 phenotypes from a monohybrid cross in snapdragons. What type of
inheritance produces such an outcome? a. complete dominance b. incomplete dominance c. multiple alleles d. continuous variation e. epistasis
The primary consumers in natural communities
are a. herbivores. b. carnivores. c. scavengers. d. decomposers. e. all of these