ENZYMES QUIZ

function as a proton shuttle

clamp the substrate into the active site

keep the specificity pocket open

neutralize the charge on the other's side chain

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

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

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

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

absence of water in the active site

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

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

proximity of Ser 195 to the active site or specificity pocket

None of these

It cleave after His residues

It cleave after Arg residues

It cleave after Lys residues

All of these

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

Enzymes speed up reactions by lowering activation energy

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

Chymotrypsin

all of these

Elastase

Trypsin

It helps to transport carbon dioxide in the blood

It is a chemical derivative of aspirin

It is critical for the biosynthesis of DNA

It catalyzes the production of hormones that maintain the stomach lining

Both require water to complete the catalytic cycle

All of these

Both show specificity for certain amino acid sequences

Both use a base to activate the nucleophile

grouping enzymes into free-floating, multienzyme complexes

concentrating enzymes within specific cellular compartments

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

All of these

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

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

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

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