What percentage of the 20 amino acids is considered to be nutritionally essential to lab animals?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%
Correct Answer:
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Q12: Zwitterions are
A)amino acids.
B)ionic molecules that are racemic.
C)ions
Q13: Matching
-When a peptide bond is formed,an _
Q14: Matching
-In the peptide Trp─Ser─Val,valine is at the
Q15: Matching
-At a pH above its pKa,the phenol
Q16: Matching
-At a pH below its pKa,the
Q18: Matching
-In the tripeptide Trp─Val─Phe,the N-terminal residue is
Q19: In the early 1930's William Rose fed
Q20: Matching
-The net charge of the zwitterion form
Q21: The pK1,pK2,and pKR for the amino
Q22: The ionization of amino acids depends on
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