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

Biology & Microbiology

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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.

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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?

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology