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WorksheetsEnzyme regulation
Total questions: 10
Worksheet time: 12mins
The allosteric inhibitor of an enzyme
Causes the enzyme to work faster
Binds to the active site
Participates in feedback regulation
Denatures the enzyme
Removal of phosphoryl groups is catalyzed by
ATCase
Dinitrogenase reductase
Protein phosphatases
Protein kinases
Which of the following is false about the following reaction?
Phosphorylase a + 2H2O → phosphorylase b + 2Pi
Phosphorylase a is less active and phosphorylase b is more active
Glycogen phosphorylase catalyzes this reaction
Phosphorylase b can be transformed back into phosphorylase a by phosphorylase kinase
Phosphorylase kinase catalyzes the transfer of phosphoryl groups from ATP to Phosphorylase b
Which of the following is false?
Allosteric modulators may be inhibitory or stimulatory
Based on the nature of modulator, allosteric enzymes are of two types
Homotropic allosteric enzymes have the substrate and modulator same
Heterotropic allosteric enzymes have the substrate and modulator same
In the case of allosteric enzymes what is the graphical representation when initial velocity is plotted against substrate concentration?
Hyperbola
Sigmoid curve
Straight line with negative slope
Parabola
Which is the enzyme that acts as a regulatory enzyme in a four-step metabolic pathway?
First enzyme
Fourth enzyme
Second enzyme
Third enzyme
What is an example of an allosteric activator?
ddATP
AMP
ATP
cAMP
How many subunits are there in ATCase
12 regulatory and 12 catalytic
6 regulatory and 6 catalytic
12 regulatory and 6 catalytic
6 regulatory and 12 catalytic
CTP is
Substrate
Allosteric inhibitor
Allosteric activator
transition state analogue
PALA is
Bisubstrate analogue
Allosteric inhibitor
Allosteric Activator
Zymogen
