Mutations in DNA are usually repaired in healthy cells by DNA repair enzymes
Indicate whether the statement is true or false
TRUE
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An antibiotic is added to a culture of E. coli, resulting in death of the cells. Bacteriophage are then added. Would the phage replicate in the E. coli cells? Why or why not?
A. Yes, because the machinery inside the cells is most likely still active, even though the cells are no longer living. The virus could use that machinery to replicate new virus particles. B. No, because the virus would depend too much on having the active machinery of a living cell for its replication. Without the ability of the cell to try to replace what is lost/damaged/used as the virus goes through its life cycle, the virus couldn't reproduce effectively. C. Yes, because viruses are capable of reanimating dead cells to force them to produce more virus particles. D. No, because entry of the virus into the target cell is dependent on the cell being alive to conduct endocytosis of the virus.
When tissues organize, what do they form?
a. a cell b. a nucleus c. an atom d. an organ e. an enzyme
The demographic transition:
a. includes a decrease in the death rate followed by a decrease in the birth rate as a population becomes industrialized. b. includes a decrease in the birth rate followed by a decrease in the death rate as a population becomes industrialized.
Which of the following diagnostic procedures depends on precipitation of antigen-antibody complexes?
A) blood typing B) immunodiffusion C) viral hemagglutination inhibition tests used to diagnose viral infections D) ELISA E) fluorescent antibody tests