Tutor profile: Amiya A.
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A 26-year-old woman complains of frontal headaches that don't respond to medicine. She has irregular menses and her peripheral vision is decreasing, bilaterally. MRI reveals a tumor. What structure might the tumor be compressing?
The crossing fibers of the optic chiasm. (The patient has bitemporal hemianopsia)
Two molecules of DNA are the same size but differ in base composition. One molecule contains 25% A + T and the other contains 60% A + T. Which molecule has a higher melting temperature?
The molecule with 25% A+T has a higher melting temperature, because G-C bonds have more H-bonds. Having more H-bonds creates greater stability, raising the temperature needed to melt the molecule.
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