________ replication is the process when DNA uses one parental strand and synthesizes a new strand, resulting in each daughter cell having a new and parental DNA strand
A) Conservative B) Redundant C) Inversion D) Semiconservative
D
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Why would letting a field be taken over by weedy, non-crop members of the bean family be potentially beneficial for farmers? (Select all correct answer options.)
A. Members of this family form symbioses with N2-fixing bacteria. B. Members of this family form symbioses with mycorrhizae. C. Weedy beans are very efficient photosynthesizers. D. It could reduce the need for commercial fertilizers in subsequent seasons.
In opsonization with IgG, why would it be important that IgG react with the antigen BEFORE a phagocytic cell recognizes the antibody molecule?
A. If the IgG is bound to the phagocyte BEFORE opsonization, it would most likely be ingested by the phagocyte before it could bind to a pathogen (it would be "naked," so to speak). B. Binding of IgG by phagocytes would block the antigen binding sites on the IgG molecules, preventing them from binding to the microbes. C. Binding of IgG by phagocytes changes their conformation-and by changing their protein conformation, their antigen binding sites are changed and they can no longer recognize their specific antigenic epitopes. D. Binding of antibody by phagocytes results in immediate release of protein-destroying enzymes to the outside of the cell. Since antibodies are proteins, they would be destroyed by these enzymes (and would then be unable to bind to their specific antigenic epitopes).
The observation that schizophrenia is associated with duplications of a certain copy number variant (CNV), while autism spectrum disorders are associated with deletions of the same CNV, suggests that _____.
a. CNV mutations are present in all psychiatric disorders b. both disorders have identical phenotypes c. both disorders have an environmental component d. both disorders share common developmental pathways e. neither disorder has a genetic component
In humans, identical twins are possible because _____
A) cytoplasmic determinants are distributed unevenly in unfertilized eggs B) extraembryonic cells interact with the zygote nucleus C) early blastomeres can form a complete embryo if isolated D) the gray crescent divides the dorsal-ventral axis into new cells