Multiple Choice
In the early 1930's William Rose fed laboratory rats a mixture of all 19 amino acids known to be present in proteins.He observed that his rats lost weight.This observation led to the discovery of ______ as the 20th amino acid found in proteins.
A) Gly
B) Ala
C) Tyr
D) Asn
E) Thr
Correct Answer:

Verified
Correct Answer:
Verified
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