Explain what happens when carbonic acid associates with carbonic anhydrase and how this can impact the blood pH.
What will be an ideal response?
Carbonic anhydrase speeds up the reversible reaction of carbonic acid to water and carbon dioxide.
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Indicators that a headache can be the presenting symptom of a serious illness and may require neuroimaging include all of the following except:
A. headaches that occur periodically in clusters. B. increasing frequency and severity of headaches. C. headache causing confusion, dizziness, and/or lack of coordination. D. headache causing awakening from sleep.
This atom in its unbound state has four valence electrons. These electrons readily form single, double, and even triple bonds among themselves to become stable. This atom is:
A. carbon. B. hydrogen. C. oxygen. D. nitrogen. E. phosphorus.
You are wanting to modify plant cells. With the procedure you are using, the plant cells must be in a plasmolyzed state. This means that the plant cells must be placed in a(n)
A) acid solution. B) hypotonic solution. C) isotonic solution. D) basic solution. E) hypertonic solution.
Aphids are small insects that insert their mouthparts into a plant to obtain phloem sap. Which would be the best way to determine if aphids must actively draw phloem sap into their digestive tract or if hydrostatic pressure in the phloem tube could force
the sap into them? A) Isolate a phloem tube from a plant, allow an aphid to insert its mouthparts, and see if the aphid can still take up sap from it. B) Measure relative rates of sugar manufacture in leaves with and without aphids. C) Insert mouthparts removed from an aphid, without including the digestive tract, into phloem sap and see if sap keeps flowing through them.