Fossil dating by amino acid racemization measured
A) the amount of a D-amino acid present.
B) the amount of an L-amino acid present.
C) the amounts of both D and L forms of an amino acid present.
D) the total of all amino acids present.
Correct Answer:
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Q11: The R group of an amino acid
Q12: Glycine is not a stereoisomer because
A)it has
Q13: Ultraviolet (UV)light can be used to estimate
Q14: Concentrations of some proteins cannot be estimated
Q15: Alanine,valine,leucine and isoleucine are important in three
Q17: Disulfide bridges can form in proteins _.
A)only
Q18: The number of commonly found amino acids
Q19: Proline is distinct among the 20 commonly
Q20: The last common ancestor of modern organisms
Q21: Proteins can be modified by adding _
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