A) Each subunit can exist in a relaxed (R) and taut (T) conformation.
B) All subunits will be in either the R or the T conformation at the same time.
C) Some subunits can be in the R state while others are in the T state.
D) The presence of inhibitors will lead to more of the enzyme being in the T form
E) the presence of activators will lead to more of the enzyme being in the R form
G) B) and D)
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A) non-protein in chemical nature.
B) always small proteins.
C) modified amino acids.
D) never required for enzymatic activity.
F) A) and B)
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A) The sequential model allows for different subunits to be in different conformations while the concerted model does not
B) Negative cooperativity can be explained by the sequential model but not by the concerted model
C) Positive cooperativity can be explained by the sequential model but not by the concerted model
D) The sequential model is explained better by considering the induced-fit model of substrate binding, whereas the concerted model focuses on perturbing the equilibrium between the T and R forms.
F) None of the above
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A) ATP inhibits and CTP activates
B) ATP activates and CTP inhibits
C) Both ATP and CTP inhibit
D) Both ATP and CTP activate
E) none of these is true
G) A) and D)
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A) are not involved in reactions of carbohydrates.
B) play an insignificant role in generating energy.
C) are important processes in prokaryotes, but not in eukaryotes.
D) can be combined to afford a high degree of control over enzymatic reactions.
E) none of these
G) B) and D)
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A) the conformational change in the enzyme in one model and not in the other.
B) the number of predicted binding sites on the enzyme.
C) the manner in which changes in quaternary structure take place.
D) the response of the enzyme to changes in temperature.
F) A) and C)
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