ENZYMES QUIZ

changing the reaction from a biosynthetic to a catabolic pathway

changing the three-dimensional shape of the molecule

the input of a small amount of activation energy

oxidizing the molecules by removing electrons

49 kJ/mol

58 kJ/mol

40 kJ/mol

88 kJ/mol

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

proximity of Ser 195 to the active site or specificity pocket

absence of water in the active site

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

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

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

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

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

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, C, and D will all still be produced

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

function as a proton shuttle

clamp the substrate into the active site

neutralize the charge on the other's side chain

keep the specificity pocket open

Both forms an acyl-enzyme intermediate

Both show specificity for certain amino acid sequences

Both require water to complete the catalytic cycle

Both use nucleophilic attack to hydrolyze the peptide bond

grouping enzymes into free-floating, multienzyme complexes

All of these

concentrating enzymes within specific cellular compartments

fixing enzymes into membranes so that they are adjacent to each other

Asparagine

Serine

water

both (a) and (b)

It cleave after Lys residues

It cleave after His residues

It cleave after Arg residues

None of these