The organelles of movement are called:
a. nuclei.
b. chloroplasts.
c. flagella and cilia.
d. mitochondria.
e. cytosol.
C
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Manatees feed mostly on:
a. small fishes. b. benthic invertebrates. c. plankton. d. aquatic plants. e. other marine mammals.
How do most motor proteins ensure their movements are unidirectional?
A.) they couple a conformational change to a thermodynamically unfavorable reaction B.) they couple a conformational change to the hydrolysis of an ATP molecule C.) they couple a conformational change to the formation of an ATP molecule from ADP and Pi D.) they hydrolyze their bound GTP, effectively preventing movement in the reverse directoin E.) their asymmetrical structures support movement in only one direction
What initiates the sodium-potassium pump?
A. Three sodium ions bind to the cytoplasmic side of the protein. B. Three sodium ions are translocated out of the cell. C. Phosphorylated pump has low affinity for sodium allowing sodium to leave and potassium to bind. D. Two potassium ions are transported into the cell. E. ATP binds to the protein which becomes phosphorylated (ADP is released).
In photosynthesis, carbon dioxide gas is reduced and combined to form glucose. This is an example of ______.
A. catabolism B. hydrolysis C. exergonic D. metabolism E. anabolism