A thick filament consists of
A) actin molecules.
B) myosin molecules.
C) actin and myosin molecules.
Answer: B
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What happens to the alpha subunit of a G protein with GDP attached?
A. It re-assembles with the beta and gamma subunits. B. It no longer activates an effector protein. C. It re-associates with the G protein-coupled receptor. D. All of these answer options are correct.
What is meant by tidal ventilation?
A. Air moves into the lungs during inhalation and air moves out of the lungs during exhalation. B. Air moves in a continuous, unidirectional flow through the lungs. C. Water is pumped back and forth across the respiratory system. D. The ventilation rate increases and decreases at regular intervals. E. None of the answer options is correct.
Water may be lost in the form of liquid from the surface of leaves through a process known as
A. guttation. B. cohesion. C. phloem loading. D. mesophyll adhesion. E. aeration.
Where does translation take place in eukaryotic cells?
a. Nucleoid b. Nucleus c. Cytoplasm d. Nucleosome