An experiment was conducted on human epithelial cells to determine the amount of radiation it would take to kill 75% of the cells. For this particular experiment it took 30 Gy of x-radiation to kill 75% of the cells. During the same experiment, it took 5 Gy of protons to kill the same percentage of cells. What is the RBE for protons? What does your answer tell us?

Below is the pKa chart you can use for your exam: Amino Acid pKa-COOH pKa-NH3 pKa-R pI Non Polar Aliphatic Glycine 2.34 9.60 5.97 Alanine 2.34 9.69 6.01 Proline 1.99 10.96 6.48 Valine 2.32 9.62 5.97 Leucine 2.36 9.60 5.98 Isoleucine 2.36 9.68 6.02 Methionine 2.28 9.21 5.74 Aromatic Phenylalanine 1.89 9.13 5.48 Tyrosine 2.20 9.11 10.07 5.66 Tryptophan 2.38 9.39 5.89 Amino Acid pKa-COOH pKa-NH3 pKa-R pI Polar Uncharged Serine 2.21 9.15 5.68 Threonine 2.11 9.62 5.87 Cysteine 1.96 10.28 8.18 5.07 Asparagine 2.02 8.80 5.41 Glutamine 2.17 9.13 5.65 Positively Charged Lysine 2.18 8.95 10.53 9.74 Histidine 1.82 9.17 6.00 7.59 Arginine 2.17 9.04 12.48 10.76 Negatively Charged Aspartic Acid 1.88 9.60 3.65 2.77 Glutamic Acid 2.19 9.67 4.25 3.22

After a Compton interaction with an outer shell electron of a calcium atom (BE = 0.04), the recoil electron sped away with 10 keV of energy. The scattered photon was deflected at an angle of 75 degrees from the original photon retaining 62 keV of energy. What was the energy of the incident photon?

R-propanolol is a synthetic drug, and therefore no isomerase exists in the body to convert it to S-propanolol.  R-propanolol in the presence of beta-receptors has a Keq of around 46500 at room temperature (25oC). What is the ΔG° of binding R-propanolol to the beta-receptor?  (R = 8.314 J/mol*K)

The Company Name Formatting program has been wrapped in a user-defined function. Assume companies is a list of names created earlier in the program. def format_companies(names):    formatted = []    for name in names:        formatted.append(name.title())    return formattedcompanies_title = format_companies(companies) Which statement about this code is correct?

Match the following methods to their descriptions

The atomic number of soft tissue and the atomic number of the air in our lungs is essentially the same. What makes the air in our lungs appear darker than soft tissue on our images?

In the adoption process,

(2 points extra credit) During a radiation accident, an individual was exposed to 2 Gy of alpha particles to the esophagus (0.05) and the stomach (0.12) and 3 Gy of neutrons to the gonads (0.2). What was the patients total effective dose?

Which of the following conditions are diagnostic x-rays most likely to be performed under?