Aamc Mcat Practice Exam 1 Study Guide Questions With 100% Correct Answers

The radioactive decay described in the passage results in the formation of which two atoms? "The reaction products were separated by SDS-PAGE and visualized by autoradiography that detects the products of B- decay." C-14 and P-32 A) N and S B) B and Si C) B and S D) N and Si {Ans: A) N and S The answer to this question is A because the type of radioactive decay is b-1 so a neutron is converted into a proton, which results in carbon becoming nitrogen and phosphorus becoming sulfur.}A certain bacterium was cultured for several generations in medium containing 15N, transferred to medium containing 14N, and allowed to complete two rounds of cell division. Given that the bacterium's genome mass is 5.4 fg when grown in 14N media and 5.5 fg when grown in 15N medium, individual bacteria with which of the following genome masses would most likely be isolated from this culture? A) 5.4 fg only B) 5.4 fg and 5.45 fg C) 5.4 fg and 5.5 fg D) 5.45 fg only {Ans: B) 5.4 fg and 5.45 f The answer to this question is B because DNA replication is semi-conservative. Therefore, after the first round