DNA polymerase I, II, and III are all high-fidelity polymerases. High-fidelity polymerases have a low rate of error during DNA replication due to their unique proofreading activity. The proofreading activity of high-fidelity polymerases results from ______________.

Imagine you work for the X-files division of the FBI. You have been assigned to determine how alien cells replicate their DNA. In your favorite course, BCH 4024, you learned that Meselson and Stahl used 15N and 14N to determine DNA replication in organisms on Earth is semiconservative. Following their procedure, you culture your alien cells in the heavy nitrogen isotope; then you move the cells to media with the light nitrogen isotope for one generation. After one generation, you prepare the alien DNA and perform density gradient centrifugation in CsCl. You observe one band at the 14N mark and one band at the 15N mark. What type of DNA replication mechanism do your alien cells use to replicate their DNA?

Which of the following statements about DNA and RNA is TRUE?

Which one of the following sets contains ONLY mixtures?   paint, wood, nitrogen, zinc oxide       oxygen, sulfuric acid, ammonia, salt cola, milk, air, tap water copper, nickel, gold, silver helium, neon, argon, krypton

When solid Na2CO3 and HCl are mixed together, which of the following is correct?             no reaction will occur, it is a simple dissolution of an ionic solid the products will be HCO3 and NaCl the products will be HCO3 and NaCl and H2O the products will be CO2 and NaCl and H2O the products will be NaCl and H2 and CO3  

Determine the molecular geometry of arsenic tetrachloride. Its Lewis’ structure is the following:  

The proximal end of a hair is the 

How many moles of H3PO4 are needed to completely react with 1.25 moles of CaCO3, according to the balanced equation: 3 CaCO3  + 2 H3PO4   à  Ca3(PO4)2  +  3 CO2   +  3 H2O                                     A.        0.833             B.        6.02 X 1023             C.        1.88             D.        1.25             E.        0.750

Which subunit of the E.coli RNA polymerase holoenzyme confers specificity for binding at a promoter?

Which subunit of the E.coli RNA polymerase holoenzyme confers specificity for binding at a promoter?