The figure above represents
a. the algae that were to give rise to plants.
b. protists.
c. fungi.
d. soil bacterium with primitive membrane
folds.
e. all of these.
D
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Changes in DNA sequence that persist in replicated DNA are
1.mutations. 2.inversions. 3.translocations. 4.replication forks. 5.origins of replication.
The most commonly accepted tree of life suggests that, after the origin of life, which of the following events occurred?
a. Bacteria arose from the first self-replicating, metabolizing cells. b. There was a split between the bacteria and a line that gave rise to the prokaryotes and eukarya. c. The fusion of a bacterium and a virus gave rise to the eukarya. d. The fusion of a bacterium and an archaeon split from the protist line. e. None of the above
Capsids are composed of protein subunits known as
a) capsomeres. b) spikes. c) envelopes. d) tail fibers.
A hungry yeast cell lands in a vat of grape juice and begins to feast on the sugars there, producing carbon dioxide and ethanol in the process:
C6H12O6 + 2ADP + 2Pi+ H+ -> 2CO2+ 2CH3CH2OH + 2ATP + 2H2O Unfortunately, the grape juice is contaminated with proteases that attack some of the transport proteins in the yeast cell membrane, and the yeast cell dies. Which of the following could account for the yeast cell's demise? (a) toxic buildup of carbon dioxide inside the cell (b) toxic buildup of ethanol inside the cell (c) diffusion of ATP out of the cell (d) inability to import sugar into the cell