Which of the following describes the second step in a DNA polymerase reaction?
A. The 3'-OH attacks the ? phosphorus of the incoming dNTP.
B. Pol I translocates, positioning the newly added nucleotide in the postinsertion site.
C. Incoming dNTP enters the insertion site.
D. PPi is hydrolyzed by pyrophosphatase to prevent the back reaction.
E. After translocation, the insertion site is now available for entry of the next dNTP.
A
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Starting with a single piece of dsDNA, after 3 PCR cycles there are
A. 2 additional pieces of dsDNA. B. 4 additional pieces of dsDNA. C. 8 additional pieces of dsDNA. D. 16 additional pieces of dsDNA.
What would a scientist see when looking through a microscope at a piece of shoulder muscle?
A. striations with branched fibers B. no striations and unbranched fibers C. no striations and branched fibers D. striations with unbranched fibers E. None of the answers are correct.
An aquatic microbe that can grow only near the surface of the water is probably which of the following?
A) a phototroph B) a heterotroph C) a chemotroph D) a lithotroph E) an anaerobe
Both cilia and flagella are involved in which of the following functions?
A) energy production B) expelling waste C) movement of cells or movement of material around a cell D) division of the cell E) production of proteins