please show work and concepts What amino acid is shown below and at which pH would it exist as written (note its protona

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please show work and concepts
What amino acid is shown below and at which pH would it exist as written (note its protonation and the charge)?
What amino acid is shown below and at which pH would it exist as written (note its protonation and the charge)?
Y, pH less than 3
F, pH less than 3
T, will not exist appreciably at any pH
T, pH greater than 5
Y, will not exist appreciably at any pH
F, pH greater than 3
Focusing only the amino side chains, which could act as a general acid catalyst at the listed pH?
Focusing only the amino side chains, which could act as a general acid catalyst at the listed pH?
D, pH = 6.7
K, pH = 12
I, pH = 7.4
Y, pH = 11.75
C, pH = 8.5
When considering the reaction coordinates below, which of the following statements is true of the reaction depicted by the leftmost reaction coordinate? Assume that all reaction coordinates are plotted with the same energy scale.
When considering the reaction coordinates below, which of the following statements is true of the reaction depicted by the leftmost reaction coordinate? Assume that all reaction coordinates are plotted with the same energy scale.
It is not possible to judge the which rates are fastest by simply looking at the reaction coordinates.
This reaction is the fastest of all three reactions depicted by their respective reaction coordinates.
The reaction is slower in the reverse direction than it is in the forward reaction.
The reaction depicted by the rightmost reaction coordinate is more spontaneous than that depicted by the leftmost reaction coordinate.
The reaction is endergonic.
ОН \N³H 0 ОН