Scientists can produce novel proteins by modifying existing proteins using:
A) affinity-related targeting
B) site-directed mutagenesis
C) modular construction
D) the yeast two-hybrid system
Ans: B) site-directed mutagenesis
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Diploid (2n) cells in the ____ of mosses, ferns, gymnosperms, and angiosperms divide meiotically and form haploid (1n) spores
Fill in the blank with the appropriate word.
A mutation in the ruvB gene mostly likely will:
A. reduce resistance to UV light. B. increase binding of RuvA to DNA. C. increase binding of RuvB to DNA. D. stabilize the Holliday intermediate. E. increase recombination of DNA.
Maintaining individual quality of life at a high level will require, above all, that humans exhibit a reproductive restraint that defies the entire history of evolution, during which "fitness" has been measured in terms of reproductive success rather than quality of life.
a. true b. false
Which of the following processes is incorrectly matched to its description?
A) Pinocytosis: Imports dissolved substance using small vesicles B) Receptor-mediated endocytosis: Uses specific binding between structures on the plasma membrane binding to ligands C) Exocytosis: Exports materials into a cell D) Endocytosis: Imports materials into a cell E) Phagocytosis: Imports undissolved substances but not whole cells or viruses