A protobiont
A. has a boundary, or membrane.
B. contains polymers inside that store information.
C. has a boundary and contains polymers inside that store information.
D. polymers that have enzymatic functions.
E. has a boundary, contains polymers that store information and other polymers that act as enzymes, and it can replicate itself.
E. has a boundary, contains polymers that store information and other polymers that act as enzymes, and it can replicate itself.
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Which organisms should be used to perform quality control on hippurate reagent?
a. C. coli and Campylobacter concisus b. Campylobacter curvus and Campylobacter hyointestinalis c. C. jejuni subsp. jejuni and C. jejuni subsp. doylei d. C. jejuni subsp. jejuni and Campylobacter coli
A large respiratory surface
a. results in a slow rate of gas exchange. b. results in a faster rate of gas exchange. c. has no effect on the rate of gas exchange. d. is important to support the respiratory needs of large animals. e. results in a faster rate of gas exchange, and is important to support the respiratory needs of large animals.
To initiate division of bacillus-shaped cells, the ________ ring forms in the center, which defines the cell division plane
a. FtsZ b. MinE c. MreB d. ZipA
Meselson and Stahl grew cells in media that contained different isotopes of nitrogen (15N and 14N) so that the DNA molecules produced from these different isotopes could be distinguished by mass
A. Explain how "light" DNA was separated from "heavy" DNA in the Meselson and Stahl experiments. B. Describe the three existing models for DNA replication when these studies were begun, and explain how one of them was ruled out definitively by the experiment you described for part A. C. What experimental result eliminated the dispersive model of DNA replication?