Level 1 – Vapor Pressure and Composition Calculation A student is investigating the effects of Raoult’s Law by preparing a liquid solution of compounds A and B. At 60 °C, the total solution boils. At this temperature, the student measures the following partial vapor pressures: Partial pressure of compound A: 400 torr Partial pressure of compound B: 360 torr Determine the percent composition (by mole fraction) of compounds A and B in the liquid solution. (Enter the relative percentages of A and B. Answer choice order may not match compound order above.)

Level 2 – Melting Point Analysis – Interpreting Results A student is in a chemistry lab and is conducting an experiment with the aid of a list of compounds to choose from, similar to what we did in our lab. A student is given a compound and must confirm its identity. They suspect it is benzoin based on its appearance, but must confirm it first. They go to the literature and note the expected melting point; then they begin to conduct a melting point experiment. The instruments and thermometer/sensor are calibrated correctly. They write in their notebook the following: “MP range average is higher than expected (+2oC compared to the ‘suspected compound’ literature value)” -and-“narrow range (1.1oC from start to finish)”  What do the results of this melting point experiment most likely indicate?

Level 2 Infrared Spectroscopy – Reading the Spectrum Given: A: B: C:D:    Which of the spectra above would best correspond to a simple alkane (no functionality)? (there is only 1 correct answer)

Which of the following is NOT a primary cavity of the vocal tract?  

Fill in the blanks with the best answer from the dropdown menu. Use each item from the dropdown menu only once.     In the immune system, the complement cascade tags for by . In the brain, the complement system may tag for by .

Pretend you are a scientist who has just conducted a GWAS. Your GWAS shows SNP 1 in the image below as the lead SNP associated with a disease. (This would be the SNP with the tallest peak on your Manhattan plot.) SNP 1 is in a non-coding region of the genome, so it’s not clear how a SNP allele at this locus would increase risk for disease. Thus, you look for more information to make a hypothesis about which SNP locus might be the functional/causal SNP (i.e., the locus with a SNP allele that actually increases risk of developing the disease). You have the information below:   Based on the information above, the best hypothesis is that SNP is the functional SNP. (Keep in mind, you will need to do more experiments to provide evidence to support this hypothesis.) From the list provided, which SNP is in linkage equilibrium with SNP 1?

Which of the following sets of interventions target REMEDIATION/RESTORATION for an individual in the Early Stage of Multiple Sclerosis?

The following case will be used for Questions 5-9: Mr. Z is a 72-year-old nursing home resident who has fallen 4 times in the past month.  Mr. Z walks quickly with short steps, he slows to a complete stop when he turns corners, and he takes close to 5 minutes to sit up and get out of his bed.   Based on recent evidence, why would a therapist prescribe an aerobic program for Mr. Z.?

For individuals with Alzheimer’s Disease and gait deficits, what type of learning strategy is MOST beneficial?  

A physical therapist is training a patient with Progressive Supranuclear Palsy on stair negotiation. Which of the following is an appropriate COMPENSATORY recommendation to improve safety when descending stairs?