Chapter 15: Enzymes

what is the general name used when the product of a reaction sequence inhibits an earlier step in that sequence?

feedback control

which of the following will cause the rate of enzyme activity to increase linearly?

increasing the enzyme concentration

in which type of inhibition does the inhibitor bind to a site other than the active site?

noncompetitive inhibition

what disease is diagnosed by monitoring acid phosphate activity?

prostate cancer

the names of enzymes are often derived from which of the following?

the reaction they catalyze and the compound on which they act (both a and b)

in addition to proteins, which types of molecules sometimes functions as enzymes?

RNA

which of the following is true of all allosteric enzymes?

binding at one site affects the protein function at a second site

which of the following can cause enzyme activity to either increase of decrease?

changing temperature and pH (both a and b)

what is the name given to the organic cofactor of an enzyme?

coenzyme

what name is give to any (organic or inorganic) nonprotein portion of an enzyme?

cofactor

in which type of inhibition does the inhibitor bind to the active site?

competitive inhibition

What disease is diagnosed by monitoring amylase activity?

pancreatic disease

what name is given to the molecule on which the enzyme works?

substrate

which of the following is true?

the majority of enzymes are globular enzymes

what is an apoenzyme?

the protein only portion of an enzyme

which of the following is true of enzymes?

they lower activation energy for chemical reaction and speed up the rate of a chemical reaction (both a and b)

which of the following is the reason that trypsin is synthesized as trypsinogen?

trypsin would attack the body's natural proteins

enzymes are classifyed into how many different major groups?

6

which of the following is used to diagnose infectious hepatitis?

ALT

which of the following are monitored to diagnose the severity of a heart attack?

CPK, AST and LDH

which of the following will cause the rate of enzyme activity to first increase then level off?

increasing the substrate oncentration

what is the name given to a material which slows down enzyme function?

inhibitor

which of the following is another name for proenzyme?

zymogen