Which temperature and pH profile curves on the graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?
A) curves 1 and 4
B) curves 1 and 5
C) curves 2 and 4
D) curves 3 and 4
A
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Which of the boxes marked 1-4 correspond to plants that will be true-breeding?
A) 1 and 4 only B) 2 and 3 only C) 1, 2, 3, and 4 D) 1 only E) 1 and 2 only
Signals from motor neurons result in action
potentials in muscle fibers, which in turn causes the __________ to release stored calcium ions. Fill in the blank(s) with the appropriate word(s).
In E. coli, which protein uses ATP to hydrolyze hydrogen bonds holding complementary strands together?
What will be an ideal response?
During inhalation, air flows into the lungs because
A. the surfactant in the lungs "draws" in air because of its adhesive properties. B. air pressure is greater outside the body than in the lungs and naturally flows inside once the chest has expanded. C. the strong chest muscles are sucking in air. D. air moves passively in and out of the lungs through time.