Why does sickle-cell hemoglobin (HbS) migrate slower than normal hemoglobin (HbA) during gel electrophoresis?
What will be an ideal response?
Answer: HbS contains valine instead of glutamate and the differences between these two is that valine has no charge for the electricity nad glutamate has a charge.
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What is the association between tropomyosin and troponin molecules in resting striated muscle fibers?
A. Tropomyosin holds the troponin in place on the myosin. B. Troponin holds the tropomyosin in place on the myosin. C. Tropomyosin holds the troponin in place on the actin. D. Troponin holds the tropomyosin in place on the actin. E. There is no known association.
Compared to uric acid, using urea as the main form of nitrogenous waste requires
a. more energy and water. b. less energy and water. c. more energy and less water. d. the same amount of energy and water. e. less energy and more water.
Oxygen and carbon dioxide are exchanged with blood directly across the alveoli wall
Indicate whether the statement is true or false
Mushrooms with gills have meiotically produced spores located in or on
a) zygosporangia. b) basidia. c) asci. d) conidiophores. e) soredia.