Glucose is converted into glucose 6-phosphate by hexokinase. Glucose 6-phosphate then serves as the substrate for the enzyme phosphoglucose isomerase, which converts this reactant into fructose 6-phosphate. Fructose 6-phosphate serves as the substrate for phosphofructokinase, which converts fructose 6-phosphate into fructose 1,6-bisphosphate. Based on the information provided, this is an example
of what?
A. Feedback inhibition
B. Allosteric regulation
C. A metabolic pathway
D. Enzyme inhibition
C
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El Niño is a recurring weather phenomenon that ____
a. increases global warming b. stabilizes world climates c. produces a fluctuation in global weather d. depletes the ozone layer e. increases oceanic productivity
In Figure 41-3, point A is:
a. the resting state.
b. indicative of repolarization.
c. the threshold level.
d. the equilibrium potential.
e. indicative of hyperpolarization
Which theory states that all organisms are made up of cells that are capable of self-reproduction and come only from preexisting living cells?
a. Atomic theory b. Cell theory c. Abiogenesis theory d. Germ theory
What, if anything, distinguishes learning from memory?
A. Learning is the process of acquiring new information while memory is the retention of that information over time. B. Memory is the process of acquiring new information while learning is the retention of that information over time. C. Both learning and memory are the process of acquiring new information. D. Both learning and memory are the retention of information over time. E. Memory does not require prior learning.