The conversion of fructose 1,6-bisphosphate to fructose 6-phosphate is catalyzed by a fructose 1,6-bisphosphatase and is one of the final steps in gluconeogenesis. Which of the following molecules is an allosteric activator of this enzyme?
(a) Pi
(b) AMP
(c) ADP
(d) ATP
(d)
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Patients with McArdle's Disease lack an enzyme in their livers that catabolizes glycogen. These individuals tire easily during exercise. Which of the following would best explain this symptom?
A. Glycogen is produced from glucose in the blood and then stored in the liver. B. Glycogen synthesis increases the energy available to cells during exercise. C. Glycogen is released from the liver into the blood by the enzyme. D. Glycogen must be broken down to glucose to be used in metabolism.
Four of the following are useful for dating fossils greater than 10 million years. Select the exception
a. Carbon-14 d. Thorium-232 b. Uranium-238 e. Rubidium-87 c. Uranium-235
An N-terminus is the end of a(n) ____________________ that has a free amino group. Fill in the blank(s) with the appropriate word(s)
What is a proteoglycan?
What will be an ideal response?