enzyme

enzymes

• an organic compound found in living organisms that is insoluble in water but soluble in nonpolar organic solvents

• naturally occurring unbranched polymer in which the monomer units are amino acid

• a compound protein that acts as a catalyst for a biochemical reaction

• a polyhdroxy aldehyde, a polyhydroxy ketone, or a compound that yields polyhydroxy aldehydes or polyhdroxy ketones upon hydrolysis

true or false: enzymes are consumed during the reaction
to help the reaction occur more rapidly

• true

• false

• maybe

which of the following statements concerning the nature of enzymes is incorrect?

• Most, but not all, enzymes are catalysts

• Most, but not all, enzymes are globular proteins

• Some, but not all, enzymes are conjugated proteins.

• no correct response

Which of the following comparisons involving enzymes and laboratory (nonbiochemical) catalysts is correct?

• Enzymes speed up reaction rates and laboratory catalysts slow down reaction rates

• Enzymes are smaller in size than most laboratory catalysts.

• Enzymes activity, but not laboratory catalyst activity, is regulated by other substances

• no correct response

what are two general structural classes of enzymes?

an enzyme composed only of protein

• conjugated enzyme

• cofactor

• holoenzyme

• simple enzyme

non – protein part of the conjugated enzyme

• cofactor

• holoenzyme

• conjugated enzyme

• apoenzyme

• simple enzyme

non – protein part in addition to a protein part

• simple enzyme

• apoenzyme

• holoenzyme

• conjugated enzyme

specialized proteins that function as biochemical catalysts.

two general structural classes of enzymes: