- Jack consumes two slices of pizza and drinks two large glasses of soda. Half an hour later, he complains of a stomachache. What is the most likely reason for Jack's upset stomach?
ASoda and lactose from the cheese combined and slowed enzyme activity.
BSoda mixed with the pizza sauce and sped up digestive enzyme activity.
CSoda raised the pH in his stomach and sped up digestive enzyme activity.
DSoda lowered the pH in his stomach and slowed digestive enzyme activity.
- Which factor decreases the rate of a chemical reaction?
AAn inhibitor
BA co-factor
CIncreased substrate
DCold temperature
- Which component decreases the activation energy of a chemical reaction?
AAn inhibitor solution
BPresence of an enzyme
CLower substrate concentration
DNeutral pH levels
- A biologist adds a vitamin solution to an enzyme/substrate solution that requires co-factors. What will happen to the substrate?
AThe vitamins will bond to the enzymes and increase their reactivity with the substrates.
BThe vitamins will bond to the enzymes and decrease their reactivity with the substrates.
CThe substrate molecules will bond to the vitamin molecules and inhibit bonding of the enzyme.
DThe substrate molecules will bond to the vitamin molecules and stimulate bonding of the enzyme.
- Jennifer stews peaches to make peach jelly. She believes the homemade jelly will make a healthy treat full of vitamins and enzymes her body needs. Which of the following disproves her prediction?
AThe peaches don't contain enzymes.
BThe jelly has too much sugar to be healthy.
CThe enzymes in the peaches have denatured.
DThe vitamins in the peaches will inhibit the enzymes.
- What statement best describes what happens during the catalytic cycle?
AThe enzyme breaks the substrate apart to prepare for the reaction.
BThe enzyme positions the substrate to increase access during a reaction.
CThe substrate uses enzyme energy to start the reaction.
DThe active site releases the substrate and replaces it with an inhibitor.
ASoda and lactose from the cheese combined and slowed enzyme activity.
BSoda mixed with the pizza sauce and sped up digestive enzyme activity.
CSoda raised the pH in his stomach and sped up digestive enzyme activity.
DSoda lowered the pH in his stomach and slowed digestive enzyme activity.
AAn inhibitor
BA co-factor
CIncreased substrate
DCold temperature
AAn inhibitor solution
BPresence of an enzyme
CLower substrate concentration
DNeutral pH levels
AThe vitamins will bond to the enzymes and increase their reactivity with the substrates.
BThe vitamins will bond to the enzymes and decrease their reactivity with the substrates.
CThe substrate molecules will bond to the vitamin molecules and inhibit bonding of the enzyme.
DThe substrate molecules will bond to the vitamin molecules and stimulate bonding of the enzyme.
AThe peaches don't contain enzymes.
BThe jelly has too much sugar to be healthy.
CThe enzymes in the peaches have denatured.
DThe vitamins in the peaches will inhibit the enzymes.
AThe enzyme breaks the substrate apart to prepare for the reaction.
BThe enzyme positions the substrate to increase access during a reaction.
CThe substrate uses enzyme energy to start the reaction.
DThe active site releases the substrate and replaces it with an inhibitor.
