FT IR Spectroscopy
The sequence of amino acids in proteins can be determined by means of

All of these
partial cleavage of the original polypeptide into smaller polypeptides
identification of the -NH2 terminal amino acids
identification of the -COOH terminal amino acids

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FT IR Spectroscopy
What does the Michelson interferometer do?

Selectively filter certain wavelengths from a beam of I.R. radiation
Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector
Split a polychromatic beam of radiation into its component wavelengths
None of these

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FT IR Spectroscopy
Why is it advantageous to record many FID signals from the same sample and then add them together?

To increase sensitivity
To remove inaccuracies caused by fluctuations in the applied magnetic field
To ensure that all target nuclei in the sample have been excited
None of these

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