Because of the environmental impact of inorganic fertilizers, scientists are working to engineer plants that more efficiently acquire phosphate. Which options below are likely to achieve that goal? (check all that apply)
_____ Plants that express more phosphatase.
_____ Plants that make mycorrhizal associations with fungi.
_____ Plants that grow less complex root systems.
_____ Smart plants that can sense phosphate levels.
_____ Plants that secrete less organic acid.
__X__ Plants that express more phosphatase.
__X__ Plants that make mycorrhizal associations with fungi.
_____ Plants that grow less complex root systems.
_____ Smart plants that can sense phosphate levels.
_____ Plants that secrete less organic acid.
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Phosphofructokinase (PFK) is an enzyme that converts fructose 6-phosphate to fructose 1,6-bisphosphate, by adding a phosphate group. This is the first committed step of the metabolic pathway of glycolysis, and thus it is very tightly regulated. AMP binds to PFK at a site distinct from the binding site for fructose 6-phosphate, and stimulates the formation of fructose 1,6-bisphosphate. ATP binds
to PFK at a site distinct from the binding site for fructose 6-phosphate, and inhibits the formation of fructose 1,6-bisphosphate. There are other regulators of this enzyme as well. What is the role of AMP in this example? A. Competitive inhibitor B. Noncompetitive inhibitor C. Allosteric inhibitor D. Allosteric activator E. Catalyst
The limbic system is involved in sleep-wake cycles
Indicate whether the statement is true or false.
Which of the following is the fundamental organizational unit of structure and function in living things?
a. Atoms b. Molecules c. Cells d. Organelles
The effects of a transposition event are equivalent to a(n)
A. nonsense mutation. B. missense mutation. C. frameshift mutation. D. silent mutation. E. HFR conjugation.