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)?

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

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

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