ENZYMES QUIZ

single reactive serine residue

cluster of reactive serine residues

hydrophilic specificity pocket

hydrophobic specificity pocket

Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2

decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2

retard the reduction of pyruvic acid to acetyl Co A and CO2

Catalyze the reduction of pyruvic acid to acetyl Co A and CO2

It cleave after Lys residues

It cleave after His residues

It cleave after Arg residues

None of these

A will still be produced, but not B, C, or D

A and B will still be produced, but not C or D

A, B, and C will still be produced, but not D

A, B, C, and D will all still be produced

presence of a low-barrier hydrogen bond in the active site or specificity pocket

absence of water in the active site

size, shape, and charge of the active site or specificity pocket

proximity of Ser 195 to the active site or specificity pocket

All of these

Enzymes are proteins whose three-dimensional form is key to their function

Enzymes do not alter the overall change in free energy for a reaction

Enzymes speed up reactions by lowering activation energy

Trypsin

all of these

Chymotrypsin

Elastase

keep the specificity pocket open

function as a proton shuttle

neutralize the charge on the other's side chain

clamp the substrate into the active site

changing the three-dimensional shape of the molecule

the input of a small amount of activation energy

changing the reaction from a biosynthetic to a catabolic pathway

oxidizing the molecules by removing electrons

a protein A and one-subunit a

a protein designated A

a protein designated B

two proteins designated A and B