For a bike racer to maintain the lead during the Tour de France, s/he would be relying on:
a. anaerobic metabolism of glucose as the primary energy source.
b. ATP stored in the muscle as the primary energy source.
c. creatine phosphate as the primary energy source.
d. insulin to convert glycogen to glucose for energy.
e. the anaerobic metabolism of lactic acid.
A
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Animal cells are permeable to water and urea but NOT to sucrose. Initially, the inside of a cell contains 1 M sucrose and 1 M urea and the outside 2 M sucrose and 1 M urea. After the system reaches equilibrium, what changes are observed?
A. The molarity of urea would be higher outside than inside the cell. B. The molarity of sucrose would be similar inside and outside the cell. C. Water would move out of the cell causing the cell to shrivel. D. The molarity of urea would be higher outside the cell and the molarity of sucrose would be similar inside and outside the cell. E. The molarity of sucrose would be similar inside and outside the cell and water would move out of the cell causing the cell to shrivel.
Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies Archaea?
a. A b. B c. C d. D e. E
One of the first successful applications of genetic engineering was the commercial production of ____
a. clotting factor b. insulin c. hemoglobin d. collagen e. human growth factor
The interaction of many separate polypeptide chains determines the ____________________ structure of a protein
molecule. Fill in the blank(s) with the appropriate word(s).