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Which of the amino acids does not exist in "L" or "D" form? (1.0 point) A- Tyrosine B- Glycine C- Alanine D- Arginine E- Tryptophan or -C-N-H)?

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Answer:

B- Glycine

Explanation:

Amino acids are very essential to our body. Amino acids have a general structure as:

HOOC - CH - NH₂

              |

              R

Where different structures of R corresponds to different amino acids.

The amino acid which do not exist in L or D form or means that which is optically inactive is glycine (R = H) because there is not chiral center in the structure.

HOOC - CH - NH₂

              |

              H

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