The ________ activity of RNA polymerase is sufficient for the process of RNA proofreading.
Fill in the blank(s) with the appropriate word(s).
3' ? 5' exonuclease
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Which of the following statements about the cell-mediated response is false? a. Cyotoxic T cells touch-kill any body cells that display viral antigen-MHC complexes on their surfaces
b. A dendritic cell that engulfed a sick body cell displays antigen from that cell, becoming an antigen-presenting cell. c. Activated cytotoxic T cells differentiate into memory cytotoxic T cells and effector helper T cells. d. Naive helper T cells bind to antigen-MHC complexes on dendritic cells.
If a father and a son are both color blind and the mother is normal, is it likely that the son inherited
color blindness from his father? What will be an ideal response?
Between the organs and the body wall, complex animals have a body cavity called a
A) mesoglea. B) coelom. C) mesoderm. D) thorax. E) cnidarian.
Rising concentrations of carbon dioxide (CO2 ) in the atmosphere result in the oceans
A) becoming more acidic. B) becoming more basic. C) containing less dissolved oxygen. D) containing less dissolved carbon dioxide.