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Which one of the following amino acids is likely to be most polar in an aqueous solution at pH 7? - glutamic acid - glycine - leucine - valine - VCE - SSCE Chemistry - Question 6 - 2012 - Paper 1
Question 6
Which one of the following amino acids is likely to be most polar in an aqueous solution at pH 7? - glutamic acid - glycine - leucine - valine
Worked Solution & Example Answer:Which one of the following amino acids is likely to be most polar in an aqueous solution at pH 7? - glutamic acid - glycine - leucine - valine - VCE - SSCE Chemistry - Question 6 - 2012 - Paper 1
Step 1
Step 2
Evaluate Polarity at pH 7
Answer
At pH 7, we consider the side chains of these amino acids:
- Glutamic Acid: Contains a carboxyl group in its side chain, making it polar and negatively charged at this pH.
- Glycine: The simplest amino acid with a neutral side chain, making it less polar than others with charged groups.
- Leucine: Has a hydrophobic aliphatic side chain, which is nonpolar.
- Valine: Similar to leucine, valine has a branched aliphatic nonpolar side chain.
Thus, glutamic acid is the most polar among them.
Step 3