The ________ is the point at which a lens focuses parallel beams of light.
Fill in the blank(s) with the appropriate word(s).
focal point
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Phosphatases are a family of enzymes that specifically remove phosphate groups from proteins that were added by protein kinases. Vanadate is an inhibitor of phosphatases in eukaryotic cells
What effect would vanadate have on the response of cells to signals received by receptor kinases? A. The response of the cell would last longer than it normally would. B. The response of the cell would be shorter than it normally would. C. The signal would still bind the receptor, so there would be no effect.
The swarming gram-negative bacillus that can be presumptively identified on the basis of a positive indole test is:
a. Klebsiella pneumoniae. b. Proteus vulgaris. c. Enterobacter aerogenes. d. Shigella sonnei.
Throughout this century, the military has
a. recycled all of its trucks and jeeps. b. processed chemicals prior to ocean dumping. c. discarded unwanted materials into the ocean. d. removed all unwanted materials to the land for processing.
Monoclonal antibodies are obtained from
A. human serum. B. animal serum. C. hybridomas. D. human B cells in culture. E. both human and animal serum.