. Which of the following terms is a general definition of an enzyme? a catalyst
ID: 1012595 • Letter: #
Question
. Which of the following terms is a general definition of an enzyme?
a catalyst
a lipid
a carbohydrate
an activator
Question 2.2. The substrate for the digestive enzyme named sucrase is
glucose
fructose
sucrose
more than one response is correct
An inactive form of an enzyme is called
a cofactor
a proenzyme
an apoenzyme
an activator
. A metal ion required for enzyme activity is called
a cofactor
a proenzyme
a substrate
a zymogen
. When enzyme activity is graphed versus the following, which graph is a straight line?
substrate concentration
enzyme concentration
pH
temperature
The conditions required for maximum enzyme function are called:
room conditions
standard conditions
optimum conditions
low pressure,
high temperature
Sulfa drugs prevent bacterial growth by acting as ____ inhibitors.
competitive
noncompetitive
irreversible
more than one response is correct
What is the function of an inhibitor?
slow down the rate of reaction
inhibit the effect of temperature and pH changes on enzyme activity
inhibit substrate effects on other chemicals in the reaction environment
slow down the interaction between the solvent and the substrate
A zymogen is correctly classified as
an organic cofactor for an enzyme
an inorganic cofactor for an enzyme
a coenzyme
an inactive form of an enzyme
Enzymes which are affected by the binding of modulators are called
induced enzymes
proenzymes
allosteric enzymes
controlled enzymes
The cyanide ion is very toxic to humans because it binds with iron (Fe3+) in what enzyme to form a stable complex that stops cellular respiration.
cytochrome reductase
cytochrome kinase
cytochrome oxidase
elastase
. Which of the following is (are) active enzyme
pepsinogen
proelastase
trypsin
all are active enzymes
21000 molecules were acted on by a single molecule of an enzyme in 15 minutes. What is the turnover number?
23
84000
1400
480
. Enzyme concentration has what effect on the rate of an enzyme catalyzed reaction
increases
decreases
no effect
increases until reaching a maximum
In an enzyme assay, 4.5 mol of substrate was consumed in 3.166 min. What is the enzyme activity expressed in IU
4.5 IU
14 IU
0.70 IU
1.4 IU
Explanation / Answer
1) a catalyst
An enzyme speeds up a chemical reaction.
2) Sucrose
Sucrase acts on sucrose and converts it into glucose and fructose
3) Proenzyme
4) Cofactor
5) Enzyme concentration
6) Optimum conditions
7) Competitive Inhibitors
8) slow down the rate of the reaction
9) an inactive form of an enzyme
10) allosteric enzymes
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.