An allosteric inhibitor
A) increases the rate of substrate binding.
B) binds and activates the high-affinity state of the enzymes.
C) is identical to the active site.
D) binds at the regulatory site.
E) is converted to an activator by the enzyme.
Answer: D
You might also like to view...
In the figure, why does the reaction rate plateau at higher reactant concentrations?
A) Feedback inhibition by product occurs at high reactant concentrations. B) Most enzyme molecules are occupied by substrate at high reactant concentrations. C) The reaction nears equilibrium at high reactant concentrations. D) The activation energy for the reaction increases with reactant concentration. E) The rate of the reverse reaction increases with reactant concentration.
Darwin observed an orchid flower with petals arranged in very long, thin tubes, rather than broad and flat, as we might see in other common flowers. What is the advantage to the orchid having an 11-inch-long nectar tube arrangement of the petals?
A. The long tube can trap insects as a source of nutrients. B. The flower can collect more sunlight for photosynthesis. C. The flower can produce nectar more easily spread over a larger area to attract more pollinators. D. The flower nectar tube can collect more rainwater to maintain health of the flower. E. The flower can only be pollinated by a specifically adapted pollinator, reducing cross-fertilization among orchid species.
Which types of hormones are typically considered first messengers?
What does the chloroplast produce during the light independent reactions of photosynthesis?
What will be an ideal response?