1. Arrange this group of molecules in order of increasing polarity: (Threonine M

Question

1. Arrange this group of molecules in order of increasing polarity: (Threonine Methionine Lysine). Briefly explain your reasoning.

2. A shard of clear, colorless solid has become an important clue in a case. You attempt to confirm your suspicion of its identity by measuring its refractive index. Predict the angle of refraction of a light ray entering a sample of cubic zirconia at an angle of incidence of 25.0 degrees.

3. Calculate the speed of light in a sample of material in which refracted light shifts from 650.000 nm to 645.000 nm.

Explanation / Answer

1. These three given compound are amino acids. So all of them contain a carboxylic and one amino group. Apart from this

Methionine contain additional -SH group

Threonine contain additional -OH group

Lysine contain no additional group

So order of polarity is

Threonine>methionine>lysine

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