AP BIO UNIT 3.1-3.3 QUIZ QUESTIONS
AND ANSWERS
Allosteric Regulation - ANSWER-any case in which a protein's function at one site is
affected by the binding of a regulatory molecule to a separate site; may result in
either inhibition or stimulation of an enzyme's activity
Cooperativity - ANSWER-It amplifies the response of enzymes to substrates: one
substrate molecule primes an enzyme to act on additional substrate molecules more
readily
Feedback Inhibition - ANSWER-A metabolic pathway is switched off by the inhibitory
binding of its end product to an enzyme that acts early in the pathway.
What are digestive enzymes? What functions do they have? - ANSWER-protein-
based biological catalysts that play important roles in our lives; remove stains, turn
the milk to cheese, turn dinner to fuel for our bodies
What is lipase? Where is it produced? Where is it active? - ANSWER-found in the
pancreas, it digests triglycerides and other lipids into fatty acids and glycerol; small
intestine
What is the effect of exposing an enzyme to a pH outside of its optimal range? -
ANSWER-pH denatures protein b/c secondary, tertiary, and quaternary shape
changes and becomes inactive; the protein unfolds and it renders it from becoming a
catalyst
Is the structure of pancreatic lipase the same as Gastric lipase? - ANSWER-no; the
structures are different because gastric lipase has to be able to work at a lower pH
level
What is the effect of taking an antacid on a person's ability to digest proteins? -
ANSWER-think of an antacid as an inhibitor; temporarily denatures enzyme
What is significant about 37 degrees C? - ANSWER-it is the temperatures of the
human body and the optimum temperature for amylase
What effect does a fever have on a child's digestion? - ANSWER-slows digestion of
enzymes and denatures some enzymes
What is the relationship between enzyme concentration and reaction rate? Why? -
ANSWER-POSITIVE; more enzymes = increased reaction rate; more enzymes =
more available active sites
What is the relationship between substrate concentration and reaction rate? Why is a
maximum reached? - ANSWER-more substrate = increase reaction rate (until the
amount of substrate exceeds the amount of enzyme); when all active sites are full,
the reaction rates levels
AND ANSWERS
Allosteric Regulation - ANSWER-any case in which a protein's function at one site is
affected by the binding of a regulatory molecule to a separate site; may result in
either inhibition or stimulation of an enzyme's activity
Cooperativity - ANSWER-It amplifies the response of enzymes to substrates: one
substrate molecule primes an enzyme to act on additional substrate molecules more
readily
Feedback Inhibition - ANSWER-A metabolic pathway is switched off by the inhibitory
binding of its end product to an enzyme that acts early in the pathway.
What are digestive enzymes? What functions do they have? - ANSWER-protein-
based biological catalysts that play important roles in our lives; remove stains, turn
the milk to cheese, turn dinner to fuel for our bodies
What is lipase? Where is it produced? Where is it active? - ANSWER-found in the
pancreas, it digests triglycerides and other lipids into fatty acids and glycerol; small
intestine
What is the effect of exposing an enzyme to a pH outside of its optimal range? -
ANSWER-pH denatures protein b/c secondary, tertiary, and quaternary shape
changes and becomes inactive; the protein unfolds and it renders it from becoming a
catalyst
Is the structure of pancreatic lipase the same as Gastric lipase? - ANSWER-no; the
structures are different because gastric lipase has to be able to work at a lower pH
level
What is the effect of taking an antacid on a person's ability to digest proteins? -
ANSWER-think of an antacid as an inhibitor; temporarily denatures enzyme
What is significant about 37 degrees C? - ANSWER-it is the temperatures of the
human body and the optimum temperature for amylase
What effect does a fever have on a child's digestion? - ANSWER-slows digestion of
enzymes and denatures some enzymes
What is the relationship between enzyme concentration and reaction rate? Why? -
ANSWER-POSITIVE; more enzymes = increased reaction rate; more enzymes =
more available active sites
What is the relationship between substrate concentration and reaction rate? Why is a
maximum reached? - ANSWER-more substrate = increase reaction rate (until the
amount of substrate exceeds the amount of enzyme); when all active sites are full,
the reaction rates levels
