Why is triose phosphate isomerase considered to be catalytically perfect?

There are parts A-C for this picture included. A) What type of enzyme is Malate Dehydrogenase? choices: Hydrolase, Isomerase, Ligase, Oxideoreductase, Transferase, or Translocase   B) Which of the following statements are true in biochemical standard conditions? There can be more than 1.  Choices:  The reaction is spontaneous since ∆G°' is positive The reaction is spontaneous since ∆G°' is negative The reaction is not spontaneous since ∆G°' is positive The reaction is not spontaneous since ∆G°' is positive The equilibrium favors products since K is greater than 1 The equilibrium favors reactants since K is greater than 1 The equilibrium favors products since K is less than 1 The equilibrium favors reactants since K is less than 1 The reaction is always at equilibrium     C) If the concentration of Oxaloacetate is 10^7 times lower than the concentration of Malate D.,Is the reaction Spontanuous?  Choices:   No, because RTInQ is very positive Yes, because RTlnQ is very…

What do carboxypeptidase andaminopeptidase have in common? Identify asmany differences between them as you can.

where is a reducing end in this image? I initially thought it'd be on the middle oxygen connecting the lactose molecules since it's the only reducing sugar, but that was incorrect for some reason.