FL 5 AAMC MCAT EXAM QUESTIONS AND ANSWERS 2024

FL 5 AAMC MCAT EXAM QUESTIONS AND ANSWERS 2024 What is the chemical structure of a component found in four of the five cofactors used by Na+- NQR? -Answer-says it is composed of flavin structure is a nucleotide base structure B could be structure C also could be structure D is an amino acid down between B and C to help, look at the captioned note on the table. it says Fl represents flavin which is the redox active center in four of the five cofactors of Na+-NQR C has an uniquinone AND HERE IS IS MENTIONED THAT UNIQUINONE IS IS A SUBSTATE What is the ratio of cation to enzyme in the spectroelectrochemical experiments described in the passage? -Answer-cation : enzyme passage says Na+NQR was diluted to a final concentration of 0.75 mM in 0.150 molar of the cation ions cation .15 M: The reaction between NADH and ubiquinone is exergonic, but the reaction, when catalyzed by Na+-NQR, does not generate much heat in vivo. What factor accounts for this difference? - Answer-Conservation of energy, it is not created nor destroyed but merely changes forms A. Is not possible, Even if it was heat generation would be larger for a catalyzed rection. C. is impossible, reactants have to be close together to react The movement of a charged particle against its concentration gradient is energetically costly. Two open flasks I and II contain different volumes of the same liquid. Suppose that the pressure is measured at a point 10 cm below the surface of the liquid in each container. How will the pressures compare? -Answer-pressure=pgh g=10 p= density (same liquid so same density) h= 10 cm both have same height so pressure will be the same-- if heights were different pressure would be different Question Which of the following substances is polar? -Answer-If there is a net dipole it is polar Question If all else is held constant, which of the following changes would NOT double the volume of a gas? -Answer-pv=nrt What is the number of neutrons in the nucleus of the atom used to produce laser radiations? - Answer-86Kr+ laser 86= mass Kr has proton number as 36 86-36=50 the cation or anion charge with any element is indicative of the charge aka electron count What is the molecular formula of the heterocyclic aromatic compound pyrrole? -Answer-passage says its a tetra pyrrole so there are 4 carbons The radiation of wavelength 605 nm CANNOT be used to produce the fluorescence radiations depicted in Figure 3 because: -Answer-Maybe if you read the passage for once in your life and not get confident then maybe you wouldn't have to take the exam for a third time Not D because look at the passage not C because of E=hc/lambda (high wavelength low energy) Approximately how many moles of Kr+ are contained in the laser tube at 0°C and 1 atm? - Answer-Have to recognize STP conditions of 0 C and 1 atm (22.4 L) Volume in PV=nrt is in L 1cm^3=1mL The CD spectroscopy signal that was used to generate the data in Figure 1 arises from the chirality of the: -Answer-look for what is chiral B is not C is not D- most beta carbons are not c