ENZYMES QUIZ

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

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

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

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

Enzymes speed up reactions by lowering activation energy

All of these

Both require water to complete the catalytic cycle

Both show specificity for certain amino acid sequences

All of these

Both use a base to activate the nucleophile

It helps to transport carbon dioxide in the blood

It catalyzes the production of hormones that maintain the stomach lining

It is critical for the biosynthesis of DNA

It is a chemical derivative of aspirin

hydrophilic specificity pocket

single reactive serine residue

hydrophobic specificity pocket

cluster of reactive serine residues

concentrating enzymes within specific cellular compartments

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

grouping enzymes into free-floating, multienzyme complexes

All of these

Elastase

Trypsin

Chymotrypsin

all of these

a protein designated A

two proteins designated A and B

a protein A and one-subunit a

a protein designated B

changing the reaction from a biosynthetic to a catabolic pathway

changing the three-dimensional shape of the molecule

oxidizing the molecules by removing electrons

the input of a small amount of activation energy

Asparagine

water

Serine

both (a) and (b)