Most of the oligotrophic proteobacteria are found in the ________.
A. alpha proteobacteria
B. delta proteobacteria
C. beta proteobacteria
D. gamma proteobacteria
Answer: A
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An adult cell that is reprogrammed to be pluripotent is called a(n):
A. embryonic stem cell. B. induced pluripotent stem cell. C. germ layer pluripotent stem cell. D. pluripotent stem cell. E. regenerative pluripotent stem cell.
In the process of protoplast fusion, cells are grown in a medium that contains
A. chitinase for yeast. B. RNAses. C. DNA ligases. D. lysozyme for bacteria. E. either lysozyme or chitinase, depending on the type of cells.
Microspheres
A. have a boundary membrane. B. are formed from heating protein-like molecules C. contain macromolecules. D. All of these answers are correct.
Enzymes are necessary for cells because
A) enzymes slow down chemical reactions that would otherwise occur too quickly to facilitate life. B) enzymes allow chemical reactions to occur under physiological conditions. C) enzymes allow chemical reactions to occur under physiological conditions and within a time frame conducive to life. D) enzymes allow chemical reactions to occur quickly enough to facilitate life. E) enzymes allow chemical reactions to take place that would otherwise be impossible.