Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
The American Medical Student Association •Welcome! •New VP & Secretary •National Convention Package •Committee Meetings! Welcome New Vice President & Secretary! Vice President: Sarah Warda Secretary: Paarth Choksi MCAT Questions Of The Day General Chemistry In HClO4, what is the oxidation number of the chlorine atom? A) -1 B) -7 C) +1 D) +7 Explanation: The typical oxidation number of oxygen atoms is -2 (as a general rule). We have four oxygen atoms so their collective oxidation number is -8. As another general rule, the oxidation number of H is +1. HClO4, as a compound, has a total oxidation number of 0, hence the oxidation number of the chlorine must be +7 to balance out the -8 from the oxygen atoms. Hydrogen contributes +1, chlorine +7, and oxygen -8 for a net total of 0. Physics Which of the following resistors must be placed in series with a 10 Ω, 20 Ω, and 50 Ω resistor in order to create a total resistance of 100 Ω in the circuit? A) 1/20 Ω B) 1/19.83 Ω C) 19.83 Ω D) 20 Ω Explanation: Resistors placed in series will add their resistances. Hence a 10, 20, and 50 Ω resistor in series create a resistance of 80 Ω in the circuit. To bring the total resistance in the circuit to 100 Ω, a 20Ω resistor must be added. Biology Which of the following amino acid substitutions would likely have the greatest impact on the 3-dimensional structure of a protein? A) B) C) D) aspartic acid to lysine valine to leucine isoleucine to leucine tyrosine to phenylalanine Explanation: Valine and leucine both have hydrophobic R-groups that are very similar in size; isoleucine and leucine are isomers of one another with a minor difference in the placement of a methyl group; tyrosine and phenylalanine are very similar in structure where both phenylalanine has a phenyl group while tyrosine has a phenol group. The biggest difference would be between aspartic acid and lysine. Aspartic acid has a relatively small, negatively charged R group while lysine has a much larger, positively charged R group. These opposing charges would have a substantial impact on their surroundings and would thus be most likely to impact the 3-dimensional structure of the protein. Of course, the location of the amino acid is also important in its impact on the structure as well. Because we are not given this information, we cannot take such measures into consideration here. Organic Chemistry Hydrogenation reactions are usually also reduction reactions, whereas protonation is not reduction. The primary reason for this is: A) protonation only occurs with nitrogen and oxygen atoms B) hydrogenation does not affect the oxidation state while protonation does C) protons do not come with electrons while hydrogen atoms in hydrogenation do come with electrons D) protons are too small to reduce compounds Explanation: Addition of H2 is the addition of two protons and two electrons. Protonation is simply the addition of one proton. Since reduction requires the addition of electrons (decrease in oxidation number), protonation cannot be a reduction. (A) is incorrect because other atoms can be protonated and even if it were true, it would not explain why protonation is not reduction. (B) is incorrect because they can both affect oxidation state. (D) is incorrect because size has no bearing on whether or not a reaction is a reduction. Upcoming Events: February 2013 • Wednesday, February 13th: 1st Committee Meeting TODAY! (5-6PM LSB-142) • Wednesday, February 20th: Rush Medical College and Chicago College of Osteopathic Medicine, Medical Student Panel • Wednesday, February 27th: Aisha Sozzer, 4th year medical student at Rush Medical College shares her personal experience and gives advice on med school admissions! • FEB 27TH: DEADLINE TO APPLY FOR “ACTIVE MEMBER STUDENT PACKAGE” Trip to National Convention! National Convention AMSA's Annual Convention March 14-17, 2013 * Washington, DC National Convention Documentary AMSA-Loyola Spring 2012-Houston, TX http://www.youtube.com/watch?v=SY2dZh4DTI&playnext=1&list=PLzItsdDJSY6z ghubTMCR7DPjXhk3mG91t&feature=resu lts_main Cost: • National Member: $265 • Non-National Member: $365 • Round-trip Airplane Tickets: prices vary • Hotels: prices vary • March 14-17 (Depart 13th, Return 17th) Funding Your Way to Convention • We understand that funding yourself to an event like this can be difficult, So the E-Board is making your trip more affordable! *ACTIVE MEMBER STUDENT PACKAGE: -We will cover hotel costs for whole trip! -We will cover 1 of your airplane tickets! Email [email protected] if you’re interested in going & want this package! *Work in progress, package deal not final. Confirmation date TBA Get your T-Shirt! • T-shirts have arrived—pick yours up today if you haven’t already received one! • Never too late to be a member! • $20 & 20 points! Office Hours (Office located in LSB Atrium; 3rd floor) *Now by appointment only* If you want to meet with any one of the E-Board members to pay your dues, socialize, or make your voice heard, please schedule an appointment by emailing us at [email protected] with your reason and availability (: OFFICIAL WEBSITE: WWW.AMSALOYOLA.ORG Email: [email protected] Facebook Group: AMSA-Loyola Make Your Voice Heard Twitter: @AMSALUC #amsaluc Committees: Meet the Assistant Directors Advocacy: Aravind Jagadeesan Healthcare Ethics: Annie Bolamperti Community Outreach: Anisa Pashaj Fellowship: Ankit Patel Campus Activities: Burhan Adhami Research: Rizwan Khan Join a committee! Learn more about Committees! Thank you AMSA! See you next week!