Problem: Which four of the following statements about amino acids are true? The Ala side chain does not form hydrogen bonds with other amino acids. Methionine is a thiol. Threonine has more than one stereocenter (chiral center). Gln and Asn are polar amino acids. Phe can undergo oxidation to form Tyr. Leucine has an overall charge at physiological pH (7.4). The form of glycine used by the human body is D-glycine.

FREE Expert Solution

The Ala side chain does not form hydrogen bonds with other amino acids.  → True (all AA can H-bonds)

Methionine is a thiol. → False; It is a sulfide

Threonine has more than one stereocenter (chiral center).  → True

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Problem Details

Which four of the following statements about amino acids are true? 

The Ala side chain does not form hydrogen bonds with other amino acids. 

Methionine is a thiol. 

Threonine has more than one stereocenter (chiral center). 

Gln and Asn are polar amino acids. 

Phe can undergo oxidation to form Tyr. 

Leucine has an overall charge at physiological pH (7.4). 

The form of glycine used by the human body is D-glycine.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Acid-Base Properties of Amino Acids concept. You can view video lessons to learn Acid-Base Properties of Amino Acids . Or if you need more Acid-Base Properties of Amino Acids practice, you can also practice Acid-Base Properties of Amino Acids practice problems.