About half of the 20 amino acids are called essential because
A) they are essential for the synthesis of pyrimidines.
B) they are essential for the synthesis of purines.
C) they are essential for nitrogen metabolism.
D) our bodies need them for protein synthesis.
E) our bodies cannot synthesize them and therefore they need to be present in our diet.
Correct Answer:
Verified
Q1: Matching
-In the tripeptide Lys─Pro─Ile,the C-terminal residue is
Q2: Which of the following statements is true?
A)Amino
Q4: Matching
-Glutathione is a tripeptide containing a central
Q5: Matching
-Biological systems usually produce a single enantiomer,whereas
Q6: Matching
-In the tripeptide Lys─Pro─Ile,there are _ charged
Q7: Which of the following amino acids is
Q8: Matching
-GABA is a neurotransmitter derived from _.
A)
Q9: Which amino acid does not have
Q10: The formation of a dipeptide from
Q11: Matching
-At a pH below its pKa,the
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