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Science Bowl Question

📅 NSB Regional 2007🎓 HS🔄 Round 16#️⃣ Question 2❓ TOSS-UP📝 Multiple Choice

Which of the following is NOT true about amino acids:

W) amino acids exist primarily as zwitterions
X) amino acid are amphoteric
Y) an amino acid becomes neutral at its isoelectric point
Z) tryptophan and cysteine contain sulfur atoms in their side chains
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