MCAT Biology › Compound Identification
How many hydrogen peaks appear in the H-NMR spectrum of 3-pentanone?
An alcohol group in a compound would result in a broad dip around what part of the infrared (IR) spectrum?
How many unique peaks would one expect to see on an 1H-NMR reading of the compound shown above?
According to HNMR spectroscopy, which of the following molecules would result in a peak at 9.5ppm?
Ultraviolet spectroscopy is used to detect conjugate double bonds in a compound. The longer the chain of conjugated double bonds in a compound, the longer the absorbed wavelength of UV light.
Which of the following compounds would result in the longest absorbed wavelength?
Which of the following statements is true concerning infrared (IR) spectroscopy?
Approximately where would a carbonyl peak be found on an IR spectrum?
Which of the following functional groups exhibits the highest frequency in an infrared (IR) spectrum?
The visible spectrum is typically between 390-700nm. Shorter wavelengths are responsible for the purple end of the color spectrum, while red is perceived in the eye from the longer wavelengths. -carotene is able to absorb light at a maximum value of 497nm.
Based on this information, what color does the eye perceive -carotene to be?
Synthetic testosterone is typically synthesized in yams and then used by athletes to boost their physical performance across various sports. This practice has been deemed illegal by most major sports authorities. Testing for synthetic testosterone use is accomplished by comparing the chemical composition of synthetic testosterone to natural testosterone.
Which method would be the most useful in identifying the chemical composition differences between natural and synthetic testosterone?