Feedback inhibition is best described as
A. substrate binding to enzyme in noncompetitive site.
B. product binding to enzyme in noncompetitive site.
C. product binding to DNA, blocking enzyme transcription.
D. substrate binding to DNA, blocking enzyme transcription.
Answer: B
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Which body feature in birds is a necessity to allow powerful flight muscles to operate?
a. a beak b. hollow, light-weight bones c. a cloaca d. an enlarged sternum with a protruding keel to bones of the upper limb. e. keen eyesight
In the electron transport chain, why do electrons flow in one direction from NADH to O2 rather than the reverse direction, or randomly?
A. Electrons flow from NADH to O2 because NADH has the most negative reduction potential and O2 the most positive with electron carriers in between, each becoming more positive to direct the electron flow. B. Electrons flow from NADH to O2 using ATP as a source of energy to drive the flow against their gradient from most negative reduction potential to most positive. C. Electrons flow from NADH to O2 because the change in free energy directs the electron flow from the molecule with the most positive reduction potential to the one with the most negative. D. Electrons flow from NADH to O2 because NADH has the most positive reduction potential and O2 the most negative with electron carriers in between, each becoming more negative to direct the electron flow.
In what biome do plants tend to be evenly spaced with large, shallow root systems? Why?
What will be an ideal response?
Your patient is an approximately 60-year-old male who presents at a local shopping mall unresponsive. Initial assessment findings are as follows: "Pt is unresponsive, has a weak rapid radial pulse, seems confused, pale, cool and clammy skin." A rapid medical assessment reveals a medical alert bracelet with insulin-dependent diabetic on it. Based on your initial assessment, what is the most likely cause of the patient's condition?
A) Hyperosmolar hyperglycemic nonketotic coma (HHNK) B) Hypoglycemia C) Hyperglycemia D) Diabetic ketoacidosis (DKA)